Bland AI vs Retell AI: pricing, features and which to choose

Bland AI’s documented origin story begins with a 2023 pivot during Y Combinator, when the company says it committed to building its own voice, language-model, speech-to-text, and text-to-speech stack. Its About page says the startup spent $1 million on GPUs despite having $400,000 in the bank, then reached $2 million in annual recurring revenue within four months after a $60,000 billboard campaign. Bland reports more than 740 million calls handled, 66 million calls per month, about 100 employees in San Francisco, and more than $50 million raised. Its backers include Y Combinator, Scale Venture Partners, Emergence Capital, Z Fellows, Team Ignite Ventures, Max Levchin, and Jeff Lawson. Its audience spans developers, teams, and regulated enterprises.

A typical Bland workflow begins by defining an agent prompt, then adding conversational pathways that map questions, decisions, and handoffs. Teams can connect knowledge bases, integrations, automations, webhooks, and API calls before assigning inbound or outbound numbers through Bland, Twilio, or SIP. During a call, the agent follows configured branches, retrieves relevant information, schedules an appointment where available, sends an in-call message when supported, and transfers the caller to a person when necessary. Afterward, teams can review transcripts, summaries, outcomes, and usage data. Enterprise customers can configure alarms for call length, API errors, latency, sentiment, silence, transcription quality, engagement, and interruptions. Adaptive resumption and node-scoped interruptibility let conversations resume and react at specific workflow steps.

Bland AI’s main limitation is cost structure: Start charges $0.14 per connected minute, while carrier fees, SMS, outbound minimums, transfers, and Norm can add separate charges. Build costs $299 monthly, which may outweigh its bundled pricing for small workloads. Vapi advertises $0.05 per minute for platform infrastructure, but teams separately select and pay for language, speech, voice, and telephony providers, increasing control and billing complexity. Retell advertises about $0.07 per minute for voice infrastructure and likewise separates provider costs, with estimated production totals of $0.11 to $0.25 per minute. Bland includes LLM, STT, and TTS in its stated rate, but reserves SSO, BAA, data residency, and advanced safeguards for Enterprise. Choose Bland for structured, high-volume business calls and consolidated AI billing; choose Vapi or Retell for component-level control.

Retell AI began as a five-person team accepted into Y Combinator in November 2023, then launched publicly in February 2024 through Hacker News and Product Hunt. The company raised a $4.6 million seed round in May 2024, backed by Alt Capital and angel investors; TechCrunch reported $4.53 million raised and hundreds of paying customers that month. Retell’s platform lets businesses build voice agents for phone and web conversations, with templates, APIs, transcripts, analytics, webhooks, simulation tools, and transfers. Its pay-as-you-go plan has no platform fee or minimum commitment, lists voice pricing at $0.07 to $0.31 per minute, and includes 20 concurrent calls. Retell later reported $40 million in annualized revenue in 2025 with a 25-person team, followed by $80 million by December 2025.

A typical Retell workflow begins with a prebuilt template or new agent, followed by configuration of prompts, conversation flows, knowledge sources, tools, transfers, voice settings, and language models. Teams can connect a web call or phone number, then review behavior in Playground, simulation, batch, web, or phone tests. Text tests are billed per message, while web and phone tests use applicable production rates. Before launch, developers can test webhook and custom-function payloads, configure fallback behavior, and revise agent versions. In production, call transcripts, analytics, filters, alerts, and quality tools support monitoring. Agents can also hand calls to staff, use knowledge bases, send SMS, and apply safety guardrails. Retell’s platform supports GPT, Claude, Gemini, ElevenLabs, Cartesia, and other voice or model options.

Retell AI’s main limitation is cost complexity: its $0.07 to $0.31 headline range excludes some telephony and add-on charges, and testing is billed at production rates rather than through a free sandbox. Vapi is a strong alternative for developer-led voice orchestration, while Bland AI offers a more focused phone-agent product; ElevenLabs Conversational AI may appeal more to teams prioritizing voice quality, since TechCrunch’s 2024 test found Retell’s synthetic voice less realistic than ElevenLabs and OpenAI’s. Retell counters with broader workflow tooling, including simulations, webhooks, analytics, transfers, versioning, guardrails, and 20 included concurrent calls. Its enterprise plan adds custom terms, SSO, access controls, and dedicated support, but requires a sales process. Pick Retell for configurable production workflows and metered experimentation, not flat pricing or self-hosting.