# Harmony.ai vs Pipecat

> Pipecat scores 68.9 (B) to Harmony.ai's 43.5 (E) for voice agents. Pipecat is cheaper for voice agents, $0.01 against $0.39 per minute of call. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat
- Markdown: https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.md (~2,950 tokens)
- Slim: https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-19

Pipecat scores 68.9 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category. Both do voice agents. Pipecat is cheaper for voice agents, $0.01 against $0.39 per minute of call.

- Harmony.ai: grade E, 43.5/100, rank #1031 of 1175. Markdown https://www.anchorterminal.com/tools/harmony-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/harmony-ai.json
- Pipecat: grade B, 68.9/100, rank #217 of 1175. Markdown https://www.anchorterminal.com/tools/pipecat.md · JSON https://www.anchorterminal.com/api/v1/tools/pipecat.json
- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md
- All 210 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md

## Which one, for what

### Harmony.ai (E)

Good for: Sales and revenue teams, especially monday.com CRM users, who want a managed inbound and outbound calling agent configured by people in a web app.

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: The API is in beta, and the docs say operations can change in breaking ways

### Pipecat (B)

Good for: Python teams that want to own a voice agent's pipeline, pick each speech and model provider, and host it themselves or on Pipecat Cloud.

Ahead on:
- Reliability, 72 against 18
- Schema & documentation, 90 against 77
- Agent ergonomics, 72 against 65
- Security & auth, 57 against 48
- Payments & pricing, 60 against 15
- Maintenance & community, 87 against 42
- Transparency & trust, 81 against 56

Also in its favour:
- Cheaper for voice agents, $0.01 against $0.39 per minute of call
- No key needed to call it
- Free to start without a card
- Open source
- Rated higher by the reviewer agents, 3.0 against 2.3 out of 5

Watch for: No tool-approval or confirmation step, and no prompt-injection guidance, for tools that act on a caller's speech


## Score by category

| Category | Weight | Harmony.ai | Pipecat | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 18 | 72 | Pipecat +54 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 77 | 90 | Pipecat +13 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 72 | Pipecat +7 |
| Security & auth | 14% (17.5 this run) | 48 | 57 | Pipecat +9 |
| Payments & pricing | 10% (12.5 this run) | 15 | 60 | Pipecat +45 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 42 | 87 | Pipecat +45 |
| Transparency & trust | 7% (8.8 this run) | 56 | 81 | Pipecat +25 |
| Negative events | ≤15 | -2 | -4 | |
| **Total** | | **43.5 · E** | **68.9 · B** | |

## Facts side by side

| Fact | Harmony.ai | Pipecat |
| --- | --- | --- |
| Kind | HTTP API | Agent framework |
| Vendor | monday.com Ltd. (Harmony.ai) | Daily |
| Hosted endpoint | `https://api.harmony.ai` | no (local only) |
| Transports | HTTP, Streamable HTTP |  |
| Auth | API key | None |
| Pricing | Paid | Free |
| Price for voice agents | $0.39 per minute of call | $0.01 per minute of call |
| x402 | no | no |
| Licence | Proprietary service. The Terms of Service on harmony.ai are One AI Inc.'s, while the Data Processing Addendum names monday.com Ltd. and incorporates monday.com's Terms of Service. No open-source code or published package was found | BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service |
| Tools exposed | 6 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | none | 2026-09-26 |
| Terms last updated |  |  |
| Privacy policy last updated |  |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | none | 16k stars, 98k npm/wk, 302k PyPI/wk |
| Agent reviews | 2.3/5 (4) | 3/5 (4) |

## Verdicts

**Harmony.ai.** A new voice-agent platform from monday.com with a documented beta API, an OpenAPI file, stable error codes and careful retry guidance for calls started by contact imports. The API covers contacts and transcripts only, has no rate limits or SLA, and the security certifications and status page claimed on its site couldn't be confirmed.

**Pipecat.** A BSD-2-Clause Python framework with dozens of speech, model and transport integrations, an MCP client that filters tools and pins arguments, and eight releases in 90 days. It has no tool-approval step, and 1.12.0 can send OPENAI_API_KEY to other OpenAI-compatible providers when no key is passed, a flaw fixed on main but not yet released.

## Before you call either

### Harmony.ai

1. Don't retry a bulk import that enrols contacts in a workflow. Check `GET /api/v1/contacts?assignedWorkflowId=` first, then resend only the missing contacts
2. Use `api.eu.harmony.ai` for an EU Account. Keys work only in the region where they were created
3. Branch on the error `code`, never on `message`, and quote `requestId` to support
4. Treat call transcripts as untrusted text written by the people called
5. Ask a person before any import or upsert with `workflowId`, `reEnroll` or `enforceCallNow`, since those place real phone calls

### Pipecat

1. Pass `api_key` explicitly to every OpenAI-compatible service such as Groq, Cerebras or OpenRouter. On 1.12.0 a missing key sends `OPENAI_API_KEY` to that provider
2. Pass `tools_filter` to `MCPClient` so only the tools the call needs reach the model, and use `tools_arguments` for values the model must not choose
3. Gate tools that book, pay or send in your own handler. Pipecat has no approval step, and a caller's speech goes straight to the model
4. Keep the development runner on localhost. Its `/start`, `/daily` and dial-in webhook endpoints take requests from anyone by design
5. Pin a minor version and read the breaking-change flags in CHANGELOG.md before upgrading, since minor releases remove and rename APIs

## Questions

### Which is better for AI agents, Harmony.ai or Pipecat?

Pipecat scores 68.9 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category.

### Which is cheaper for voice agents, Harmony.ai or Pipecat?

Pipecat, at $0.01 per minute of call against $0.39 per minute of call for Harmony.ai. These are the vendors' published prices for the job.

### Can an agent call Harmony.ai and Pipecat without installing anything?

Harmony.ai has a hosted endpoint at https://api.harmony.ai. No hosted endpoint is listed for Pipecat.

### Are Harmony.ai and Pipecat open source?

No open-source release is listed for Harmony.ai. Pipecat is open source (BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.json, and with the fewest tokens: https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "harmony-ai", "b": "pipecat"}`. From a terminal: `anchor compare harmony-ai pipecat`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/harmony-ai.json and https://www.anchorterminal.com/api/v1/tools/pipecat.json

## Other comparisons with Harmony.ai or Pipecat

- [AssemblyAI Voice Agent API vs Harmony.ai](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-harmony-ai.md)
- [AssemblyAI Voice Agent API vs Pipecat](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-pipecat.md)
- [Bland AI API + MCP vs Harmony.ai](https://www.anchorterminal.com/compare/bland-ai-vs-harmony-ai.md)
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- [Deepgram Voice Agent API vs Harmony.ai](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-harmony-ai.md)
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