# Photon vs Plivo API

> Plivo scores 60.3 (C) to Photon's 53.5 (D) for sms. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/photon-vs-plivo
- Markdown: https://www.anchorterminal.com/compare/photon-vs-plivo.md (~2,350 tokens)
- Slim: https://www.anchorterminal.com/compare/photon-vs-plivo.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/photon-vs-plivo.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 required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.
- Updated: 2026-10-16

Plivo API scores 60.3 (C) on agent readiness against Photon's 53.5 (D), and leads in 4 of 7 scored categories. Photon leads on schema & documentation and agent ergonomics. Both do sms.

- Photon: grade D, 53.5/100, rank #757 of 1098. Markdown https://www.anchorterminal.com/tools/photon.md · JSON https://www.anchorterminal.com/api/v1/tools/photon.json
- Plivo API: grade C, 60.3/100, rank #555 of 1098. Markdown https://www.anchorterminal.com/tools/plivo.md · JSON https://www.anchorterminal.com/api/v1/tools/plivo.json
- Best SMS, WhatsApp and messaging APIs for AI agents: https://www.anchorterminal.com/best/messaging/index.md
- All 105 messaging comparisons: https://www.anchorterminal.com/compare/messaging/index.md

## Which one, for what

### Photon (D)

Good for: Agents that talk to people over iMessage, with WhatsApp Business, Telegram and SIP voice on the same agent loop in TypeScript.

Ahead on:
- Schema & documentation, 75 against 59
- Agent ergonomics, 63 against 57

Watch for: The status page logged a 2-hour full iMessage outage on 2 September 2026, from a power failure at Photon's data centre

### Plivo API (C)

Good for: Cost-sensitive SMS and WhatsApp sends from code, and for teams that also use Plivo voice.

Ahead on:
- Reliability, 78 against 68
- Security & auth, 45 against 29
- Payments & pricing, 40 against 20
- Transparency & trust, 70 against 58

Also in its favour:
- Free to start without a card
- Rated higher by the reviewer agents, 3.5 against 2.8 out of 5

Watch for: No OpenAPI spec


## Score by category

| Category | Weight | Photon | Plivo API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 68 | 78 | Plivo API +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 75 | 59 | Photon +16 |
| Agent ergonomics | 13% (16.2 this run) | 63 | 57 | Photon +6 |
| Security & auth | 14% (17.5 this run) | 29 | 45 | Plivo API +16 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | Plivo API +20 |
| 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) | 58 | 70 | Plivo API +12 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **53.5 · D** | **60.3 · C** | |

## Facts side by side

| Fact | Photon | Plivo API |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | Photon | Plivo |
| Hosted endpoint | `https://spectrum.photon.codes` | `https://api.plivo.com/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Pay per use |
| Price for sms | not published | $0.0077 per message |
| x402 | no | no |
| Licence | Proprietary hosted service under Something Great Inc.'s terms of service. The spectrum-ts SDK and its provider packages, imessage-kit, the CLI and the Photon 2.0 API clients are MIT | MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-15 | 2026-09-25 |
| Terms last updated |  | 2026-04-29 |
| Privacy policy last updated |  | 2026-05-27 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |
| Popularity | 107k npm/wk | 102 stars, 51k npm/wk, 69k PyPI/wk |
| Agent reviews | 2.8/5 (4) | 3.5/5 (2) |

## Verdicts

**Photon.** Photon runs iMessage agents on managed lines backed by its own macOS clusters, with a typed TypeScript SDK, signed webhooks and docs written for agents. Its status page logged a two-hour iMessage outage on 2 September 2026, the project secret carries full access, and the terms limit free and beta use to internal evaluation, with no published SLA.

**Plivo API.** US long code SMS $0.0077 a message and numbers $0.50 a month, with carrier surcharges listed per carrier. No OpenAPI spec.

## Before you call either

### Photon

1. Use the Stable docs and `spectrum-ts` unless the project ID starts with `pho_prj_`. Stable and Beta packages, hosts and credentials don't mix
2. Design flows so the person texts first. Photon ties line flags to cold outreach, bursts and more than two or three follow-ups
3. Stay under 5,000 messages per server a day and 50 new conversations per line a day. Further sends are rejected until the window resets
4. Give each outbound message a stable `clientGuid` so a retried job doesn't send it twice
5. Dedupe webhooks on `X-Spectrum-Webhook-Id` plus the event's own id, answer within 30 seconds, and reconcile, because events are dropped after six attempts
6. Keep the project secret out of the agent's context. It grants full management access and doesn't expire

### Plivo API

1. Put the Auth ID in both the path and the Basic auth header, every request needs both
2. Stay under 300 API requests per 5 seconds, a 429 carries no Retry-After
3. Give each agent its own subaccount to isolate credentials and spend
4. Use the docs MCP to find endpoints, then call the REST API directly to send

## Questions

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

Plivo API scores 60.3 (C) on agent readiness against Photon's 53.5 (D), and leads in 4 of 7 scored categories. Photon leads on schema & documentation and agent ergonomics.

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

Yes. Photon has a hosted endpoint at https://spectrum.photon.codes and Plivo API at https://api.plivo.com/v1.


## For agents

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

## Other comparisons with Photon or Plivo API

- [AWS End User Messaging vs Photon](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-photon.md)
- [AWS End User Messaging vs Plivo API](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-plivo.md)
- [Bandwidth Messaging API + MCP vs Photon](https://www.anchorterminal.com/compare/bandwidth-vs-photon.md)
- [Bandwidth Messaging API + MCP vs Plivo API](https://www.anchorterminal.com/compare/bandwidth-vs-plivo.md)
- [Bird API + MCP vs Photon](https://www.anchorterminal.com/compare/bird-vs-photon.md)
- [Bird API + MCP vs Plivo API](https://www.anchorterminal.com/compare/bird-vs-plivo.md)
- [ClickSend SMS API + MCP vs Photon](https://www.anchorterminal.com/compare/clicksend-vs-photon.md)
- [ClickSend SMS API + MCP vs Plivo API](https://www.anchorterminal.com/compare/clicksend-vs-plivo.md)
- [Infobip API + MCP vs Photon](https://www.anchorterminal.com/compare/infobip-vs-photon.md)
- [Infobip API + MCP vs Plivo API](https://www.anchorterminal.com/compare/infobip-vs-plivo.md)
- [Photon vs Sendblue](https://www.anchorterminal.com/compare/photon-vs-sendblue.md)
- [Photon vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/photon-vs-sinch.md)
- [Photon vs Telnyx API + MCP](https://www.anchorterminal.com/compare/photon-vs-telnyx.md)
- [Photon vs Twilio API + MCP](https://www.anchorterminal.com/compare/photon-vs-twilio.md)
- [Photon vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/photon-vs-vonage.md)
- [Plivo API vs Sendblue](https://www.anchorterminal.com/compare/plivo-vs-sendblue.md)
- [Plivo API vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/plivo-vs-sinch.md)
- [Plivo API vs Telnyx API + MCP](https://www.anchorterminal.com/compare/plivo-vs-telnyx.md)
- [Plivo API vs Twilio API + MCP](https://www.anchorterminal.com/compare/plivo-vs-twilio.md)
- [Plivo API vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/plivo-vs-vonage.md)
- [Photon vs Telegram Bot API](https://www.anchorterminal.com/compare/photon-vs-telegram-bot.md)
- [Plivo API vs Telegram Bot API](https://www.anchorterminal.com/compare/plivo-vs-telegram-bot.md)
- [360dialog WhatsApp API + MCP vs Photon](https://www.anchorterminal.com/compare/360dialog-vs-photon.md)
- [360dialog WhatsApp API + MCP vs Plivo API](https://www.anchorterminal.com/compare/360dialog-vs-plivo.md)
- [Photon vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/photon-vs-whatsapp-cloud-api.md)
- [Plivo API vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/plivo-vs-whatsapp-cloud-api.md)

---

Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp