# Ably vs Webhook Relay (slim)

> Ably scores 75 (BB) to Webhook Relay's 57.8 (C) for receiving webhooks. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/ably-vs-webhook-relay.md (~2,300 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/ably-vs-webhook-relay.json · canonical https://www.anchorterminal.com/compare/ably-vs-webhook-relay
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Ably scores 75 (BB) on agent readiness against Webhook Relay's 57.8 (C), and leads in 6 of 7 scored categories. Webhook Relay leads on payments & pricing. Both do receiving webhooks.

- Ably: BB 75, rank #59 of 950 · https://www.anchorterminal.com/tools/ably.min.md
- Webhook Relay: C 57.8, rank #597 of 950 · https://www.anchorterminal.com/tools/webhook-relay.min.md
- Ably, good for Fan-out of live messages to many connected clients, presence and resumable streams, with webhooks and queues as ways to get channel events to a backend. Ahead on Reliability, 87 against 47; Schema & documentation, 80 against 71; Agent ergonomics, 87 against 59; Maintenance & community, 85 against 55; Transparency & trust, 78 against 63. Also Agent-ready, a grade of BB or better.
- Webhook Relay, good for Teams that need third-party webhooks to reach localhost, on-premises CI or private Kubernetes services, with an agent that can configure buckets and inspect failed deliveries over MCP. Ahead on Payments & pricing, 50 against 40.

| Category | Ably | Webhook Relay |
| --- | --- | --- |
| Reliability (16%) | 87 | 47 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 80 | 71 |
| Agent ergonomics (13%) | 87 | 59 |
| Security & auth (14%) | 64 | 61 |
| Payments & pricing (10%) | 40 | 50 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 55 |
| Transparency & trust (7%) | 78 | 63 |

| Fact (where they differ) | Ably | Webhook Relay |
| --- | --- | --- |
| Vendor | Ably Realtime Ltd | AppScension Ltd |
| Hosted endpoint | `https://main.realtime.ably.net` | `https://my.webhookrelay.com/v1` |
| Transports | HTTP, SSE (legacy) | HTTP |
| Auth | API key | OAuth or key |
| Licence | Proprietary service under Ably's terms of service. The SDKs and the Ably CLI on GitHub are Apache-2.0 | Proprietary hosted service under Webhook Relay's terms of service. The Go SDK is BSD-3-Clause and the TypeScript SDK is MIT. The `relay` CLI and the server are closed source |
| Tools exposed | none | 40 |
| Read-only variant documented | no | yes |
| Last release | 2026-09-30 | 2026-05-23 |
| Terms last updated | no date given | 2019-11-25 |
| Privacy policy last updated | no date given | 2018-06-01 |
| Terms restrict automated access | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 1.5M npm/wk, 407k PyPI/wk | 9 stars, 24 npm/wk |