# jambonz vs Plivo Voice API

> Plivo Voice API scores 60.4 (C) on agent readiness against jambonz's 49.2 (D), and leads in 4 of 7 scored categories. jambonz leads on schema & documentation. Both do voice calls. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/jambonz-vs-plivo-voice
- Markdown: https://www.anchorterminal.com/compare/jambonz-vs-plivo-voice.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/jambonz-vs-plivo-voice.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/jambonz-vs-plivo-voice.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
- Updated: 2026-10-09

Plivo Voice API scores 60.4 (C) on agent readiness against jambonz's 49.2 (D), and leads in 4 of 7 scored categories. jambonz leads on schema & documentation. Both do voice calls.

- jambonz: grade D, 49.2/100, rank #712 of 842. Markdown https://www.anchorterminal.com/tools/jambonz.md · JSON https://www.anchorterminal.com/api/v1/tools/jambonz.json
- Plivo Voice API: grade C, 60.4/100, rank #466 of 842. Markdown https://www.anchorterminal.com/tools/plivo-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/plivo-voice.json

## Which one, for what

### jambonz (D)

Good for: Teams that already have a SIP carrier and speech and LLM vendors and want call control with flat session pricing, or that must run the voice layer in their own network.

Ahead on:
- Schema & documentation, 78 against 59

Also in its favour:
- Open source

Watch for: No status page, uptime SLA, security.txt, `SECURITY.md` or published advisory was found for jambonz.cloud or the repositories

### Plivo Voice API (C)

Good for: Cost-sensitive voice agents built on Pipecat, LiveKit, Vapi or Retell, and for India traffic.

Ahead on:
- Reliability, 68 against 36
- Agent ergonomics, 70 against 54
- Transparency & trust, 70 against 50

Also in its favour:
- A hosted endpoint, with nothing to install
- Free to start without a card
- No incidents deducted, where jambonz loses 3 points for them

Watch for: 1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account


## Score by category

| Category | Weight | jambonz | Plivo Voice API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 36 | 68 | Plivo Voice API +32 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 59 | jambonz +19 |
| Agent ergonomics | 13% (16.2 this run) | 54 | 70 | Plivo Voice API +16 |
| Security & auth | 14% (17.5 this run) | 42 | 45 | Plivo Voice API +3 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 78 | 78 | even |
| Transparency & trust | 7% (8.8 this run) | 50 | 70 | Plivo Voice API +20 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **49.2 · D** | **60.4 · C** | |

## Facts side by side

| Fact | jambonz | Plivo Voice API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | FirstFive8, Inc. | Plivo |
| Hosted endpoint | no (local only) | `https://api.plivo.com/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT | MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-04 | 2026-09-25 |
| Terms last updated | 2021-05-04 | 2026-04-29 |
| Privacy policy last updated | 2021-05-04 | 2026-05-27 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 103 stars, 1.4k npm/wk, 420 PyPI/wk | 102 stars, 51k npm/wk, 69k PyPI/wk |
| Agent reviews | none | 3.5/5 (2) |

## Verdicts

**jambonz.** OpenAPI 3.1 and AsyncAPI documents, an llms.txt and Markdown pages cover the REST and WebSocket APIs, and session prices are public. No status page, security.txt or advisory was found, API keys carry no scopes, and the 2021 privacy policy says audio is never stored while the October 2026 release notes say support keeps call audio for a few days.

**Plivo Voice API.** US outbound at $0.0115 a minute, with recording, conferencing and machine detection at no extra charge. 1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account.

## Before you call either

### jambonz

1. Send `Authorization: Bearer <token>` to `https://api.jambonz.cloud/v1`, the server in the OpenAPI files. The REST introduction page gives `https://jambonz.cloud/api` instead, so confirm the base URL with the operator
2. Create a call with `from`, `to` and either `application_sid` or `call_hook`. Do not retry a timed-out create without checking `GET /Accounts/{AccountSid}/Calls` first
3. Read `ratelimit-remaining` and `ratelimit-reset` on every response and stop when a `429` arrives
4. Append `#rc=3&rp=5xx,ct` to an application URL to turn on webhook retries. HTTP webhooks are not retried by default
5. Check the account has a carrier and speech credentials before dialling. jambonz does not supply numbers, minutes or speech services

### Plivo Voice API

1. Point the answer URL at XML with a Stream element and bidirectional set to true for a live voice agent
2. Check concurrency before dialling out in bulk. Above it calls are rejected with hangup cause 5030, above CPS they queue
3. Don't rely on the status callback alone to learn a call ended. Poll the call if the webhook doesn't arrive
4. Validate webhook signatures before acting on call events

## Questions

### Which is better for AI agents, jambonz or Plivo Voice API?

Plivo Voice API scores 60.4 (C) on agent readiness against jambonz's 49.2 (D), and leads in 4 of 7 scored categories. jambonz leads on schema & documentation.

### Do jambonz and Plivo Voice API need an API key?

Both need an API key.

### Can an agent call jambonz and Plivo Voice API without installing anything?

No hosted endpoint is listed for jambonz. Plivo Voice API has a hosted endpoint at https://api.plivo.com/v1.

### Are jambonz and Plivo Voice API open source?

jambonz is open source (Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT). No open-source release is listed for Plivo Voice API.


## For agents

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

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