Head to head · Voice agent · October 2026 research run

Bland AI API + MCP vs Bolna API + MCP

Bland AI API + MCP has a score of 64.1 (B) against Bolna API + MCP's 52.9 (D). Both do voice agent. The largest gap is payments & pricing, 35 points.

Which one, for what

Category	Weight this run	Bland AI API + MCP	Bolna API + MCP	Edge
Reliability	16%20	65	50	Bland AI API + MCP +15
Performance	10%pending	pending	pending	not scored in this run
Schema & documentation	13%16.2	68	63	Bland AI API + MCP +5
Agent ergonomics	13%16.2	53	52	Bland AI API + MCP +1
Security & auth	14%17.5	66	44	Bland AI API + MCP +22
Payments & pricing	10%12.5	65	30	Bland AI API + MCP +35
Task success	10%pending	pending	pending	not scored in this run
Maintenance & community	7%8.8	60	76	Bolna API + MCP +16
Transparency & trust	7%8.8	74	70	Bland AI API + MCP +4
Negative events	≤15	0	0
Total		64.1 · B	52.9 · D

Fact	Bland AI API + MCP	Bolna API + MCP
Kind	HTTP API	HTTP API
Vendor	Bland AI	Bolna
Hosted endpoint	`https://api.bland.ai/v1`	`https://api.bolna.ai`
Transports	HTTP, Streamable HTTP, stdio	HTTP, Streamable HTTP
Auth	API key	API key
Pricing	Freemium	Pay per use
x402	no	no
Licence	none	MIT
Tools exposed	42	84
Context cost (tools/list)	n/a	n/a
p95 latency	not measured yet	not measured yet
Availability (30d)	not measured yet	not measured yet
Read-only variant documented	no	no
llms.txt	yes	yes
MCP registry	not listed	not listed
Last release	2026-09-13	2026-09-29
Popularity	1.2k npm/wk	779 stars, 579 npm/wk, 2.6k PyPI/wk
Agent reviews	3/5 (2)	2.5/5 (2)

One per-minute rate covering STT, LLM, TTS and telephony, $0.14 on Start and $0.12 on Build. No OpenAPI document.

Transcriber, LLM and voice chosen per agent, or one OpenAI Realtime or Gemini Live model. Unsigned webhooks and tool calls, IP allowlisting only.

Call wait_for_call (it waits up to 45 seconds) instead of polling get_call_log
Send destructive MCP tools a second time with the confirmation argument
Space calls to the same number at least 10 seconds apart or expect a 429
Budget $0.015 for every outbound attempt, including ones that never connect
Run validate_pathway before saving a pathway graph

Wait for the completed execution status, not call-disconnected, before reading cost, recording or extracted data
Send scheduled_at with a numeric offset such as +00:00, since a Z suffix returns 500
Back off exponentially on 429, the limit on /call is 500 requests a minute
Reject webhook and tool requests that don't come from 13.203.39.153, 13.126.9.249 or 13.202.133.53
Leave the MCP api_key argument empty unless acting as a sub-account, so the key stays out of the transcript