Best AI Voice Agents for HubSpot Users in 2026

An AI voice agent for HubSpot users is software that answers and places phone calls using speech recognition, a language model and synthesized speech, and writes call outcomes to HubSpot contact and deal records. According to HubSpot's 2024 State of Sales report, 68% of sales leaders say integrating AI tools with their CRM is a top priority.

This article compares six AI voice agent platforms for teams using HubSpot: Vapi, Retell AI, Bland AI, Synthflow, Thoughtly and 11x. The main dividing line is build model: three are developer platforms requiring code, three are no-code builders. Pricing was checked in November 2026 from vendor pages and documentation.

What are the best AI voice agents for HubSpot users in 2026?

The best AI voice agents for HubSpot users in 2026 are Vapi, Retell AI, Bland AI, Synthflow, Thoughtly and 11x. Vapi, Retell AI and Bland AI meet the most documented requirements for HubSpot workflows because each has a native or documented integration, supports custom telephony providers and publishes compliance certifications, according to their respective documentation pages. Synthflow, Thoughtly and 11x are better fits for non-technical teams because they provide no-code builders, though their HubSpot integrations and compliance documentation vary in depth.

Pricing checked November 2026. Sources linked in each vendor section.

How does a voice agent handle HubSpot workflows?

A voice agent for HubSpot users follows these steps to handle inbound or outbound calls and update CRM records:

1. Call initiation: the agent receives an inbound call via a phone number, or places an outbound call to a contact pulled from a HubSpot list or workflow trigger.
2. Contact lookup: the agent queries HubSpot via API or integration to retrieve the contact record, including name, deal stage, previous interactions and custom properties.
3. Conversation: the agent transcribes the caller's words using speech recognition, sends the transcript to a language model for intent understanding and response generation, and plays synthesized speech back to the caller.
4. Data collection: during the call, the agent captures information such as appointment preferences, objections, qualification answers or support ticket details.
5. Outcome logging: when the call ends, the agent writes a summary, transcript, call duration, disposition and any collected data to the HubSpot contact record's timeline or activity feed.
6. Field updates: the agent updates HubSpot contact properties (for example, lead status, last contact date, qualification score) and deal properties (stage, close date, notes) based on the conversation outcome.
7. Task creation: if the call requires follow-up, the agent creates a HubSpot task assigned to a sales rep or support agent, with context from the call.
8. Workflow triggers: the updated contact properties or logged activity can trigger HubSpot workflows, such as sending a follow-up email, scheduling a demo or moving a deal to the next stage.

What should you look for in a voice agent for HubSpot users?

Does it integrate natively with HubSpot?

A native HubSpot integration means the voice agent connects directly to HubSpot's API to read contact data before a call and write outcomes after. Vapi, Bland AI, Synthflow and Thoughtly each publish HubSpot integrations in their documentation, while Retell AI connects to HubSpot via Zapier. Native integrations are faster to set up and more reliable than custom-built API connections, but they may not support every HubSpot object or custom field without additional configuration.

Can it log calls and outcomes to HubSpot contact records?

Call logging writes the transcript, summary, duration and disposition to a contact's activity timeline in HubSpot. Vapi's HubSpot integration documentation shows it can log call summaries and update contact properties. Bland AI's integration page states it writes transcripts and outcomes to contact timelines. Synthflow and Thoughtly both list call logging as a feature on their respective integrations pages. Without automatic logging, your team must manually enter call notes, which slows follow-up and reduces data quality.

Does it support the telephony provider you already use?

Most voice agent platforms support multiple telephony providers, including Twilio, Vonage and Telnyx, or provide their own phone numbers. Vapi's telephony documentation lists Twilio, Vonage, Telnyx and Vapi-provided numbers. Retell AI supports Twilio and its own numbers. Bland AI provides numbers in 60+ countries according to its documentation. If you already have phone numbers and a telephony contract, choosing a platform that integrates with your provider avoids porting numbers and renegotiating contracts.

Can it transfer calls with context to your team?

Warm transfer means the voice agent can hand off a live call to a human agent and pass along the conversation context, such as the caller's name, reason for calling and what the agent already discussed. Vapi's transfer documentation describes warm transfer with context. Retell AI supports call transfer with conversation history. Bland AI's documentation does not list warm transfer as a feature as of November 2026. For sales and support teams, warm transfer prevents callers from repeating themselves and improves conversion rates.

Are compliance documents and certifications published?

Compliance certifications such as SOC 2 Type II, HIPAA BAA availability and GDPR readiness indicate a vendor has undergone third-party audits of its security and data-handling practices. Vapi publishes SOC 2 Type II certification on its security page. Retell AI lists SOC 2 compliance on its site. Bland AI's security page does not list SOC 2 or HIPAA certifications as of November 2026. Compliance does not make your deployment compliant; it depends on how you configure the agent, obtain consent and handle recordings. Consult legal counsel for TCPA, recording-consent laws and HIPAA requirements.

Is pricing predictable at your call volume?

Predictable pricing means you can estimate your monthly bill based on expected call volume and average call duration. Vapi charges $0.05 per minute as of November 2026, with no platform fee on the pay-as-you-go plan. Retell AI charges $0.08 per minute with no base fee. Bland AI charges $0.09 per minute for outbound calls. Synthflow starts at $29 per month plus per-minute usage. Thoughtly starts at $99 per month plus usage. 11x does not publish pricing; its model is custom quotes. Platforms that bundle telephony, speech models and the language model into a single per-minute rate are easier to forecast than those that itemize each component.

How were these voice agents selected?

These six platforms were included because each has AI voice agents for phone calls today, a cited public page shows HubSpot integration or the ability to connect to HubSpot via API or automation, and its build model and pricing model can be described from documentation or pricing pages checked in November 2026. They are ordered by how many of the six stated requirements (native HubSpot integration, call logging, telephony flexibility, warm transfer, published compliance certifications, predictable pricing) each vendor meets according to cited sources. Ties are broken alphabetically. This order reflects documented fit for HubSpot users, not a quality score. No first-party testing, demos or trial accounts were used; all information comes from vendor documentation, pricing pages and published integrations.

1) Vapi

Vapi is a developer platform for building AI voice agents that answer and place phone calls. It has a native HubSpot integration that reads contact data before calls and writes outcomes to contact records after, according to its documentation as of November 2026. Vapi suits HubSpot users with developer resources who need deep customization of call flows, HubSpot field mapping and telephony providers.

Best for: developer teams needing deep HubSpot customization and control over call logic.

Key capabilities

• Native HubSpot API integration that reads contact properties and writes call summaries and outcomes to contact timelines.
• Warm transfer with context to human agents, passing conversation history and caller details.
• Support for Twilio, Vonage, Telnyx and Vapi-provided phone numbers across multiple countries.
• Custom function calling to trigger HubSpot workflows, update deal stages or create tasks during a call.
• SOC 2 Type II certified as of November 2026, according to its security page.

Pricing

Vapi charges $0.05 per minute on its pay-as-you-go plan, with no monthly platform fee, as of November 2026 according to its pricing page. The per-minute rate includes telephony, speech-to-text, the language model and text-to-speech. A $49 per month Starter plan adds priority support and higher rate limits. The pricing page does not specify whether phone number rental or premium voices incur additional charges.

Limitations

• Requires code to build agents; no visual or no-code builder is available, according to Vapi's quickstart guide.
• HubSpot integration requires API key configuration and custom field mapping, which may need developer time to set up.
• Documentation does not list pre-built HubSpot templates or workflows; each integration is custom-built.

Requirements met

Vapi meets five of the six stated requirements: native HubSpot integration (documented), call logging to contact records (documented), telephony flexibility (Twilio, Vonage, Telnyx, Vapi numbers), warm transfer with context (documented), and published compliance certifications (SOC 2 Type II). Pricing is predictable at $0.05 per minute with no platform fee. The limitation is that it requires developer resources to build and maintain agents.

2) Retell AI

Retell AI is a developer platform for building conversational voice agents. It has HubSpot integration via Zapier that can create contacts, log call summaries and update contact properties, according to its integration documentation as of November 2026. Retell AI suits HubSpot users with technical teams who want flexible automation between the voice agent and HubSpot workflows.

Best for: teams wanting flexible HubSpot logging and automation via Zapier.

Key capabilities

• Zapier integration that connects to HubSpot to create contacts, log call summaries and update fields after calls.
• Call transfer with conversation history to human agents.
• Support for Twilio and Retell-provided phone numbers in multiple countries.
• Custom webhooks to trigger HubSpot API calls or workflows during or after a call.
• SOC 2 compliant as of November 2026, according to its security page.

Pricing

Retell AI charges $0.08 per minute on its pay-as-you-go plan, with no monthly base fee, as of November 2026 according to its pricing page. The per-minute rate includes telephony, speech recognition, the language model and speech synthesis. The pricing page does not specify whether Zapier automation or premium language models incur additional charges.

Limitations

• HubSpot integration is via Zapier, not a native API connection, which adds a dependency on a third-party automation platform and may introduce latency.
• Requires code to build agents; no no-code builder is available, according to Retell AI's documentation.
• Documentation does not list pre-built HubSpot workflows or templates; integrations are custom-configured.

Requirements met

Retell AI meets five of the six stated requirements: HubSpot integration via Zapier (documented), call logging to contact records (via Zapier), telephony flexibility (Twilio, Retell numbers), warm transfer with context (documented), and published compliance certifications (SOC 2). Pricing is predictable at $0.08 per minute with no platform fee. The limitation is that it requires developer resources and relies on Zapier for HubSpot connectivity.

3) Bland AI

Bland AI is a developer platform for building AI voice agents, with a focus on outbound calling at scale. It has a native HubSpot integration that writes call transcripts and outcomes to contact timelines, according to its documentation as of November 2026. Bland AI suits sales teams making high-volume outbound calls to HubSpot contacts and needing batch calling from CRM lists.

Best for: sales teams making high-volume outbound calls to HubSpot contacts.

Key capabilities

• HubSpot integration that writes call transcripts, summaries and outcomes to contact activity timelines.
• Batch calling from HubSpot contact lists or CSV uploads, with outcome logging back to HubSpot.
• Phone numbers in 60+ countries provided by Bland AI, according to its documentation.
• Custom webhooks to trigger HubSpot workflows or update deal stages during calls.

Pricing

Bland AI charges $0.09 per minute for outbound calls on its pay-as-you-go plan, with no monthly platform fee, as of November 2026 according to its pricing page. The per-minute rate includes telephony, speech-to-text, the language model and text-to-speech. The pricing page does not specify whether inbound calls, premium voices or additional phone numbers incur separate charges.

Limitations

• Documentation does not list warm transfer with context as a feature; calls appear to end when the agent completes its script, based on Bland AI's feature pages as of November 2026.
• Requires code to build agents; no no-code builder is available, according to Bland AI's quickstart guide.
• Security page does not list SOC 2, HIPAA or ISO 27001 certifications as of November 2026.

Requirements met

Bland AI meets four of the six stated requirements: native HubSpot integration (documented), call logging to contact records (documented), telephony flexibility (Bland-provided numbers in 60+ countries), and predictable pricing ($0.09 per minute with no platform fee). Warm transfer with context is not documented, and compliance certifications are not published. The platform requires developer resources.

4) Synthflow

Synthflow is a no-code builder for AI voice agents that answer and place phone calls. It has a published HubSpot integration that updates contact fields and creates tasks, according to its integrations page as of November 2026. Synthflow suits non-technical HubSpot users who need simple contact updates and call logging without writing code.

Best for: non-technical teams needing simple HubSpot contact updates and call logging.

Key capabilities

• HubSpot integration that updates contact properties and creates tasks after calls, according to its integrations page.
• No-code visual builder for designing call flows, according to Synthflow's documentation.
• Phone numbers provided by Synthflow in multiple countries.
• Call recording and transcription with summaries.

Pricing

Synthflow charges $29 per month for its Starter plan, which includes 30 minutes of call time, as of November 2026 according to its pricing page. Additional minutes are charged per minute, but the pricing page does not specify the per-minute rate. A Pro plan at $99 per month includes 200 minutes. The pricing page does not specify whether the per-minute rate includes telephony, speech-to-text, the language model and text-to-speech.

Limitations

• HubSpot integration documentation does not specify whether it supports custom fields, deal updates or workflow triggers; the integrations page lists only contact property updates and task creation.
• Documentation does not list warm transfer with context as a feature as of November 2026.
• Security page does not list SOC 2, HIPAA or ISO 27001 certifications as of November 2026.

Requirements met

Synthflow meets three of the six stated requirements: HubSpot integration (documented for contact updates and task creation), call logging (call recording and transcription documented), and no developer resources required (no-code builder). Warm transfer, published compliance certifications and telephony flexibility (beyond Synthflow-provided numbers) are not documented. Pricing is predictable with a monthly base fee plus usage, though the per-minute rate is not published.

5) Thoughtly

Thoughtly is a no-code platform for building AI voice agents, with pre-built templates for common workflows. It has HubSpot integration that logs call data to contact records, according to its integrations page as of November 2026. Thoughtly suits operations teams wanting pre-built HubSpot call logging and simple contact updates without custom development.

Best for: operations teams wanting pre-built HubSpot call logging and template-based workflows.

Key capabilities

• HubSpot integration that logs call summaries and outcomes to contact records, according to its integrations page.
• No-code builder with pre-built templates for common use cases, according to Thoughtly's features page.
• Call recording and transcription with automated summaries.

Pricing

Thoughtly charges $99 per month for its Starter plan, which includes 100 minutes of call time, as of November 2026 according to its pricing page. Additional minutes are charged per minute, but the pricing page does not specify the per-minute rate. A Professional plan at $499 per month includes 1,000 minutes. The pricing page does not specify whether the per-minute rate includes telephony, speech-to-text, the language model and text-to-speech.

Limitations

• HubSpot integration documentation does not specify whether it supports custom fields, deal stage updates or workflow triggers; the integrations page lists only call logging to contact records.
• Documentation does not list warm transfer with context as a feature as of November 2026.
• Security page does not list SOC 2, HIPAA or ISO 27001 certifications as of November 2026.

Requirements met

Thoughtly meets three of the six stated requirements: HubSpot integration (documented for call logging), call logging to contact records (documented), and no developer resources required (no-code builder with templates). Warm transfer, published compliance certifications and telephony flexibility are not documented. Pricing is predictable with a monthly base fee plus usage, though the per-minute rate is not published.

6) 11x

11x is a managed AI sales agent service; its voice agent is called Julian. It has HubSpot integration that enriches lead data and logs call outcomes, according to its integrations page as of November 2026. 11x suits sales teams focused on outbound prospecting to HubSpot leads who want a managed service rather than building agents themselves.

Best for: sales teams focused on outbound prospecting to HubSpot leads who want a managed service.

Key capabilities

• HubSpot integration that enriches lead data and logs call outcomes to contact records, according to its integrations page.
• Managed service model: 11x operates the voice agent (Julian) on behalf of the customer, according to 11x's product page.
• Outbound prospecting focus, with lead research and personalized call scripts, according to 11x's documentation.

Pricing

11x does not publish pricing on its website as of November 2026. According to its pricing page, pricing is custom and provided via sales quotes. The pricing model is based on the number of leads contacted and outcomes achieved, but specific rates could not be confirmed from a public source at the time of writing.

Limitations

• Pricing is not publicly listed; requires a sales conversation to obtain a quote.
• Managed service model means less control over call scripts, voice and logic compared to platforms where you build the agent.
• HubSpot integration documentation does not specify whether it supports custom fields, deal stage updates or workflow triggers; the integrations page lists only lead enrichment and call logging.

Requirements met

11x meets two of the six stated requirements: HubSpot integration (documented for lead enrichment and call logging) and no developer resources required (managed service). Warm transfer, published compliance certifications, telephony flexibility and predictable pricing are not documented. The managed service model is a fit for teams that prefer outsourcing agent operation to building and maintaining agents in-house.

What does a voice agent for HubSpot users cost?

Voice agent pricing for HubSpot users follows two models: per-minute usage with no base fee (Vapi, Retell AI, Bland AI) or a monthly platform fee plus per-minute usage (Synthflow, Thoughtly). The formula for estimating monthly cost is:

Monthly cost ≈ (calls per month) × (average minutes per call) × (all-in per-minute rate) + platform fees + phone number rental + add-ons

Vapi charges $0.05 per minute with no platform fee. Retell AI charges $0.08 per minute with no platform fee. Bland AI charges $0.09 per minute for outbound calls with no platform fee. Synthflow charges $29 per month for 30 minutes, then additional minutes at an undisclosed rate. Thoughtly charges $99 per month for 100 minutes, then additional minutes at an undisclosed rate. 11x does not publish pricing.

Below is an illustrative cost scenario for a HubSpot sales team making 500 outbound calls per month, averaging 3 minutes per call, totaling 1,500 minutes per month. Every input is an illustrative assumption; actual costs depend on your call volume, duration and the vendor's full pricing structure.

Illustrative scenario. Actual costs depend on call volume, duration, telephony provider, language model selection and add-ons.

Phone number rental, premium voices, advanced language models and integrations may incur additional charges not shown in the table. Consult each vendor's pricing page and request a quote for your specific volume.

How do you roll out a voice agent for HubSpot users?

Rolling out a voice agent for HubSpot users follows these steps:

1. Scope call types and outcomes (1 to 2 weeks): decide which inbound or outbound call types the agent will handle (lead qualification, appointment setting, support triage, follow-up calls) and what outcomes it should log to HubSpot (qualified/unqualified, appointment booked, issue resolved, callback requested).
2. Script and escalation path (1 to 2 weeks): write the agent's conversation script, including how it introduces itself, asks qualification questions, handles objections and transfers to a human. Define when the agent escalates (complex questions, angry callers, requests for a human) and which HubSpot owner or queue receives the transfer.
3. Connect systems (1 to 3 weeks): integrate the voice agent platform with HubSpot via native API, Zapier or webhooks. Configure which HubSpot contact properties, deal fields and tasks the agent reads before calls and writes after. Connect your telephony provider or provision new phone numbers.
4. Consent and disclosure review (1 week): consult legal counsel to ensure the agent's introduction complies with TCPA (for outbound calls), state recording-consent laws (all-party consent in California, Connecticut, Florida, Illinois, Maryland, Massachusetts, Montana, New Hampshire, Pennsylvania and Washington) and GDPR (for EU contacts). Add required disclosures to the agent's opening script.
5. Pilot on a slice of traffic (2 to 4 weeks): route a small percentage of calls (10% to 20%) to the agent, or run it on a specific HubSpot list (for example, leads in a single region or deal stage). Monitor call transcripts, outcomes logged to HubSpot and escalation rate daily.
6. Review transcripts and tune (ongoing): read call transcripts weekly to identify where the agent misunderstands questions, gives incorrect answers or escalates unnecessarily. Update the script, add FAQ answers and refine HubSpot field mappings. Track metrics such as containment rate (calls resolved without escalation), average handle time and HubSpot data quality.
7. Expand to full volume (1 to 2 weeks): once the pilot shows acceptable containment and data quality, route all eligible calls to the agent. Continue monitoring transcripts and HubSpot logs, and schedule monthly script reviews to incorporate new product information, pricing changes and common objections.

Total rollout time is typically 6 to 12 weeks from scoping to full deployment, depending on the complexity of your HubSpot workflows and the depth of your script.

Frequently asked questions

Can AI voice agents update HubSpot deal stages automatically?

Yes, AI voice agents can update HubSpot deal stages automatically if the platform supports HubSpot API integration or webhooks. Vapi's HubSpot integration and custom function calling allow agents to update deal properties and stages during or after a call, according to its documentation. Retell AI can trigger HubSpot deal updates via Zapier or webhooks. Bland AI supports webhooks to update deal stages. The agent must be configured to recognize conversation outcomes (for example, "prospect agreed to demo" moves deal to "Demo Scheduled" stage) and map them to HubSpot deal stage IDs.

Which voice agent has the best HubSpot integration?

Vapi has the most documented HubSpot integration for teams with developer resources, because its native API integration supports reading contact properties before calls, writing call summaries and outcomes to timelines, and custom function calling to update deal stages and create tasks during calls, according to its documentation as of November 2026. For non-technical teams, Synthflow has a simpler HubSpot integration that updates contact fields and creates tasks via a no-code builder. The best fit depends on whether your team can write code and how deeply you need to customize HubSpot field mappings and workflow triggers.

Do voice agents for HubSpot require developer resources?

Vapi, Retell AI and Bland AI require developer resources because each is a code-required platform with API-based configuration, according to their respective quickstart guides and documentation. Synthflow and Thoughtly do not require developer resources; both have no-code builders with visual interfaces for designing call flows and configuring HubSpot integrations, according to their documentation and features pages. 11x is a managed service, so no in-house development is needed; 11x operates the voice agent on behalf of the customer. Choose a no-code builder or managed service if your team lacks engineering capacity.

How much does a voice agent cost for a HubSpot team making 500 calls per month?

For a HubSpot team making 500 calls per month averaging 3 minutes per call (1,500 minutes total), illustrative monthly costs are: Vapi $75 (1,500 minutes × $0.05), Retell AI $120 (1,500 minutes × $0.08), Bland AI $135 (1,500 minutes × $0.09), based on their respective pricing pages as of November 2026. Synthflow and Thoughtly charge monthly platform fees ($29 and $99) plus per-minute usage, but their per-minute rates are not published, so total costs cannot be calculated. 11x does not publish pricing. These are illustrative assumptions; actual costs depend on call duration, telephony provider, language model selection and add-ons.

Can a voice agent pull HubSpot contact data during a call?

Yes, voice agents can pull HubSpot contact data during a call if the platform supports real-time API lookups. Vapi's HubSpot integration retrieves contact properties before and during calls, according to its documentation. Retell AI can query HubSpot via webhooks during a call to fetch contact details, deal stage or previous interaction history. Bland AI supports custom webhooks to pull HubSpot data mid-call. Pulling contact data allows the agent to personalize greetings, reference past conversations and tailor its script based on deal stage or lead score.

Do voice agents for HubSpot support call recording consent?

Voice agents for HubSpot can announce call recording and request consent if configured to do so in the opening script. Vapi, Retell AI, Bland AI, Synthflow and Thoughtly all support call recording, according to their respective feature pages, but none automatically handles state-specific consent requirements. Your team must add the required disclosure to the agent's script (for example, "This call is being recorded for quality and training purposes. By continuing, you consent to recording.") and consult legal counsel to ensure compliance with all-party consent laws in California, Connecticut, Florida, Illinois, Maryland, Massachusetts, Montana, New Hampshire, Pennsylvania and Washington. Some states require explicit opt-in; others allow implied consent if the caller continues after the disclosure.

Can you use a voice agent with HubSpot's free CRM tier?

Yes, voice agents can connect to HubSpot's free CRM tier via API, but HubSpot's free tier has API rate limits of 100 requests per 10 seconds, according to HubSpot's developer documentation. High call volumes may exceed this limit, causing API errors or delayed contact updates. Vapi, Retell AI and Bland AI all use HubSpot's API, so they are subject to the same rate limits. Synthflow and Thoughtly do not publish whether their HubSpot integrations are affected by free-tier rate limits. If your team makes more than a few dozen calls per hour, you may need a paid HubSpot tier (Starter, Professional or Enterprise) with higher API limits.

How long does it take to connect a voice agent to HubSpot?

Connecting a voice agent to HubSpot takes 1 to 3 weeks, depending on the platform and the depth of the integration. Vapi's HubSpot integration requires generating a HubSpot API key, configuring which contact and deal properties to read and write, and testing the connection, which typically takes 1 to 2 weeks for a developer. Retell AI's Zapier integration can be set up in a few hours for simple contact creation and call logging, but custom field mappings and workflow triggers may take 1 to 2 weeks. Synthflow and Thoughtly have pre-built HubSpot connectors that can be configured in a few days via their no-code builders, according to their respective integrations pages. Additional time is needed to test call outcomes, verify HubSpot data quality and train your team on the integration.

Last updated: November 2026.