Vapi vs Retell vs Bland AI: Comparing Voice Agent Platforms in 2026

Vapi vs Retell vs Bland at a Glance

Plan limits and features come from each vendor's pricing page, docs and trust center on October 10, 2026. Latency figures are vendor claims, and none of the three publishes a reproducible method for its headline number.

Is Retell AI Better Than Vapi?

Retell is better when a product or operations team will build the agent without code, needs a signed BAA quickly or wants QA scoring of production calls built in; Vapi is better when developers want to choose every model and voice provider, bring their own keys and manage agents through the API. Bland, the third option here, fits teams that want one bundled rate on Bland's own models instead of choosing providers.

• Vapi - Best for developer teams that want to own the stack, with the widest model choice, bring-your-own keys, no provider markup and voice-mode Simulations. The trade-off: it remains developer-first; since Workflows retired, its no-code options are the assistant editor, the visual Squad builder and Composer (alpha); and HIPAA is a paid add-on.
• Retell AI - Best for teams that want to ship fast, especially in healthcare. Its no-code Conversation Flow builder, 20 free concurrent calls (per its pricing page), free self-signed BAA and AI QA on real calls make it, in my view, the shortest path to compliant production. The trade-off: a curated model list, no bring-your-own keys, no EU hosting and text-only simulations.
• Bland AI - Best for enterprises that want predictable per-minute costs and private deployment on Bland's own models. Bland announced a Series C in June 2026, per a release on VCA Online. The trade-off: no LLM choice, a BAA only on Enterprise plans and, per Bland's migration guide, a Pathways migration due November 15, 2026.

How You Build Agents on Vapi, Retell and Bland

Vapi's and Bland's builders both changed in August and September 2026, so check the date on any tutorial before you follow it.

• Vapi - Vapi retired its visual Workflows builder on August 18, 2026, and existing workflows stopped running the next day, per Vapi's migration guide. Agents are now built in the dashboard's assistant editor, as multi-agent Squads on a visual canvas or in JSON through the API, or by describing them to Composer, an alpha assistant that writes the prompt, configures settings and provisions numbers. Custom tools on your own server still need code.
• Retell - Retell's drag-and-drop Conversation Flow builder has nodes for conversation, tool-calling subagents, functions, code, SMS, MCP, call and agent transfers, IVR navigation by keypad tones and logic branches, and each node can use its own model, per Retell's Conversation Flow docs. Developers also get single-prompt agents and the API; multi-prompt agents are now legacy.
• Bland - Bland's Agents builder, launched in September 2026, is the successor to Conversational Pathways: agents start from a prompt, and pathways live inside them as flows on a canvas. Per Bland's migration guide, existing accounts keep both dashboards until November 15, 2026, the deadline for moving production pathways (any still taking traffic after that are migrated for you), and accounts created after September 18, 2026 get only the new builder.

LLM and Voice Provider Choice

• Vapi - Vapi's model docs list OpenAI, Azure OpenAI, Anthropic, Google, Groq, Cerebras, DeepSeek, Mistral, xAI and others, plus any OpenAI-compatible endpoint, and its voice docs cover more than a dozen speech providers, from Deepgram and AssemblyAI to ElevenLabs, Cartesia and Rime. With your own key, the provider bills you instead of Vapi.
• Retell - Retell offers curated OpenAI, Anthropic and Google models plus realtime speech-to-speech, speech-to-text from Azure, Deepgram, Soniox and AssemblyAI, and seven voice providers, per its voice provider docs. A Retell support answer on its community forum says it doesn't support bring-your-own keys; you can connect a custom LLM over a WebSocket instead.
• Bland - Bland runs speech-to-text, the LLM and text-to-speech on its own models, per its FedRAMP page, and the FAQ on its Vapi comparison page says Vapi may be a better fit if choosing your own LLM provider is a priority.

How Vapi, Retell and Bland Price Their Minutes

All three charge by the minute but build that minute differently. To compare them, price one identical agent (the same LLM where you can choose one, the same voice tier and telephony route) on each platform the same day, then add the concurrency and compliance terms you need. Current rates are on Vapi's pricing page, Retell's pricing page and Bland's pricing page.

• Vapi - A per-minute hosting fee on top of speech-to-text, the LLM, text-to-speech and transport, each passed through at the provider's price with no markup, per the pricing page and its estimator. Vapi's own telephony, SIP and web transport carry no fee, though hosting and model costs still apply. New accounts get free credits and 4 concurrent calls; the paid Core plan raises that to 10 and adds zero data retention; HIPAA with a BAA is a monthly add-on.
• Retell - Voice infrastructure, text-to-speech and the LLM, plus telephony, itemized in Retell's pricing calculator; its testing docs say the total can vary more than fourfold with the model and voice. Knowledge base, PII removal and AI QA (free for the first 100 analyzed minutes, per its AI QA docs) cost extra per minute. New accounts get free credits, and every account includes 20 concurrent calls, per the pricing page.
• Bland - One rate covering the LLM, speech-to-text and text-to-speech, with no token charges and a lower rate for transfer minutes, per Bland's pricing page. The free Start plan has no platform fee. Build adds a monthly platform fee for a lower per-minute rate and higher limits; at the rates listed on October 10, 2026, the lower rate covers that fee only above roughly 15,000 minutes a month, though Start's daily call cap can force the move sooner. Telephony is separate, on your own carrier or Bland's Twilio connection at pass-through cost.

Telephony, Concurrency and Call Volume

• Vapi - One free US number for inbound calls, per its free telephony docs; outbound needs an imported Twilio, Telnyx or Vonage number or a BYO SIP number. Outbound Campaigns take up to 10,000 contacts per CSV, scheduled up to seven days ahead, per Vapi's campaign docs.
• Retell - Retell sells numbers and imports yours over SIP, with Twilio, Telnyx and Vonage guides, and its contact-center docs go furthest of the three: step-by-step guides for Avaya, Genesys Cloud and Five9, plus Amazon Connect setup through Retell support.
• Bland - Bland's built-in Twilio connection, your own Twilio account or a SIP trunk, with guided SIP setups for Vonage, Asterisk, 3CX, Cisco and RingCentral, plus batch calls from a CSV. Bland's pricing page caps Start at 10 concurrent calls and 100 calls a day, and Build at 50 concurrent calls and 2,000 calls a day.

Latency Claims and How They Are Measured

• Vapi - Its homepage claims "<500ms average latency." Vapi's latency methodology docs cover only per-component medians from production calls, summed into a rough total that excludes endpointing and transport.
• Retell - Its homepage claims "~600ms latency," citing independent benchmarks without a linked method.
• Bland - Bland claims "under 400ms end-to-end" on its Vapi comparison page, "sub-second latency" on its homepage and "under 200ms on the standard model tier" on its voice product page, and its speech page documents a method only for text-to-speech, timed to the first audio.

Your real latency depends on your LLM, voice, region and carrier route, so measure it on your own agent with the latency test below.

Are Vapi, Retell and Bland HIPAA Compliant?

All three say they support HIPAA, but the BAA comes on different terms: free and self-signed on Retell, with a paid monthly add-on on Vapi, and only on Enterprise plans on Bland.

• Retell - Retell's compliance docs list SOC 2 Type 1 and Type 2, HIPAA and GDPR, and its homepage adds ISO 27001. Any customer can self-sign the BAA and a DPA with EU Standard Contractual Clauses at no extra fee, and a signed BAA is required before you send protected health information. Retell doesn't operate services in the EU; its homepage lists an Enterprise on-prem option, sold through sales with no public setup docs.
• Vapi - Vapi's trust center lists SOC 2 Type II and SOC 3 reports, plus HIPAA, GDPR, PCI DSS v4.0.1 and CCPA. The BAA comes with the paid HIPAA add-on, and zero data retention is included from Core up. Vapi's FAQ says it does not support on-premise deployments, and its success-package docs reserve the EU region for the Premier Success Package.
• Bland - Bland's trust center lists SOC 2 Type II, ISO 27001:2022, PCI DSS v4.0.1, HIPAA and GDPR, and its trust and security page marks HIPAA and GDPR as self-attested and says the BAA is signed before launch. Its pricing page includes the BAA only on Enterprise. Enterprise customers also get the widest private-deployment choice of the three: their own AWS, GCP or Azure VPC, GPU clusters in their data center, or fully air-gapped hardware.

Bland is also FedRAMP 20x Class A certified, per Bland's FedRAMP page.

Other Voice Agent Platforms to Consider

• ElevenAgents (ElevenLabs) - Voice and chat agents in 90+ languages, with built-in simulations and automated tests plus Twilio, Genesys and Amazon Connect integrations, per ElevenLabs' agents page.
• Synthflow - An enterprise voice AI platform sold on annual contracts scoped to call volume, concurrency, telephony and integrations, per its pricing page.
• PolyAI - Enterprise voice agents on PolyAI's own models, with a builder that runs from no-code to full code.
• Pipecat and LiveKit Agents - Open-source frameworks (BSD-2-Clause and Apache-2.0, per their GitHub repositories) for teams that build and host the whole pipeline.

If you're leaving Bland, TestMu AI's Bland AI alternative page covers testing whichever platform you pick next.

Built-In Testing: Vapi vs Retell vs Bland

A voice agent that works in a demo can still mishear an accent, talk over a caller or book the wrong appointment. Each platform's built-in tools catch some of that, and they test different things.

Sources: Vapi's voice testing docs, simulations overview, config-as-code docs and changelog; Retell's testing overview, AI QA and Live Monitoring docs; Bland's Evaluations docs, Testbed and environments docs; all checked October 10, 2026.

Use these tools while you build: they catch prompt regressions fastest, and all three can feed a release gate. Their documented limits mark what still needs testing outside the platform.

Note: TestMu AI Agent Testing calls your agent over real phone lines with simulated callers built from 200+ voice profiles, 50+ accents and dialects and 15 background-noise presets, per TestMu AI's voice agent testing page. Try Agent Testing free

How to Test a Voice Agent Before Launch

Run the built-in tests on every change, then add independent tests for what they leave out, starting with the gaps Vapi's and Retell's own docs name. These are the tests I'd run before any of the three takes customer calls.