Retell AI
The developer-first voice stack: real MCP server, real fine-tuning, a live pricing calculator on the homepage — just remember $0.07/min is the floor, not the bill.
PRICING
| Pay as you go | $0.07-$0.31/min | $10 free credits, 20 free concurrent calls, no platform fee or minimum commitment |
| Enterprise | Custom | Dedicated stable server, no concurrent call cap, HIPAA/BAA, custom SSO/MSA/DPA, 24/7 support |
The advertised rate covers voice infrastructure only ($0.055/min). A realistic setup with TTS, an LLM and telephony stacked on runs $0.11-$0.31/min depending on model choice; this stacked-billing structure is the single most common complaint in independent G2 review round-ups.
checked 2026-08-05 · vendor pricing page
Element scores
Strengths
True self-serve, pay-as-you-go pricing with a live cost calculator on the homepage, model-agnostic access to the current frontier LLM lineup (GPT 5.x, Claude 4.6, Gemini 3.x) plus bring-your-own custom model, a working MCP server for managing agents from Cursor or Claude Desktop, and a genuinely deep testing stack — graded regression test sets, live A/B split-testing, and an AI Quality Assurance add-on that auto-scores production calls.
Honest dings
The advertised $0.07/min is voice-infrastructure only; real production cost with LLM, TTS and telephony stacked on runs $0.11-$0.31/min, and G2 reviewers flag this pricing structure as the most common complaint. CRM integrations beyond Cal.com/HubSpot/Salesforce are limited without custom API work, and reported real-world latency (1s+ in some regions) sometimes runs above the ~600-800ms headline benchmark.
Sources
Every audit lists the research it rests on — transparency and traceability are the product. Tools evolve: each audit is a snapshot of its audit date, and re-audits supersede older versions (kept below for reference).
- docs.retellai.com/general/introduction — Official docs: product overview, MCP server ('Manage agents from Cursor, Claude Desktop, and more'), build/test/deploy/monitor surfaces (accessed 2026-08-05)
- retellai.com/pricing — Official: full component pricing breakdown (voice infra, TTS, LLM, telephony, add-ons), pay-as-you-go vs Enterprise comparison table (accessed 2026-08-05)
- retellai.com/customers — Official: '3,000+ businesses trust Retell' customer count claim (accessed 2026-08-05)
- finance.yahoo.com/technology/ai/articles/voice-ai-s… — Official company press release (GlobeNewswire, 22/06/2026): ARR $10M→$60M in 12 months, 55M+ AI calls/month, named enterprise customers, Best Places to Work ranking (accessed 2026-08-05)
- sacra.com/research/retell-ai-60m-yr-up-650-yoy — Independent research: $60M annualized revenue estimate (April 2026, up 650% YoY), competitive positioning vs Vapi/Sierra/Decagon (accessed 2026-08-05)
- thoughtly.com/blog/retell-ai-review — Independent review: G2 rating (4.8/5, 2,241 reviews), Trustpilot rating (5.0/5, 816 reviews), compliance status (accessed 2026-08-05)
- retellai.com/blog/best-llm-for-voice-ai-agents — Official blog: full LLM menu (GPT 5.x tiers, Claude Sonnet 4.5/4.6), custom/self-hosted LLM endpoint support (accessed 2026-08-05)
- retellai.com/blog/training-and-customizing-voice-ag… — Official blog: documented fine-tuning process using real call transcripts (accessed 2026-08-05)
- cloudtalk.io/blog/retell-ai-alternative — Independent: G2-sourced complaints on stacked pricing unpredictability, limited CRM integrations, real-world latency variance (accessed 2026-08-05)
- retellai.com/changelog — Official changelog: function calling launch history, live transcript feature, fine-tuned LLM for conciseness (accessed 2026-08-05)
- startupintros.com/orgs/retell-ai — Independent: founding story (YC W24), early customer traction (Ro telehealth), seed funding total (accessed 2026-08-05)