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RelayKit

relaykit.io

From $9/mo Free plan WebAPI
Visit relaykit.io
Spec score 7.8 #20 of 29 in Webhook Management Software

What it is

RelayKit is a cloud service and API for receiving, inspecting, verifying, storing, and forwarding webhook events from third-party services. One incoming event can be delivered to multiple destinations in parallel, with each destination tracked and retried independently. Failed deliveries receive automatic retries of up to 20 attempts, and users can replay events manually. Inbound signature verification supports Stripe, GitHub, Shopify, Twilio, SendGrid, Paddle, Clerk, and Resend. Security controls include IPv4 and IPv6 IP allowlisting, configurable rate limits, and audit records for rejected requests. RelayKit says it forwards the original request body and headers, except for specified hop-by-hop headers. The @relaykit/cli can send webhooks to a local development server and requires Node.js 18 or later. Hobby costs nothing for 1,000 webhooks monthly. Pro costs $9 a month for 100,000 webhooks, and Team costs $29 a month for 500,000. Team adds Schema Sentinel, Time Machine replay, and priority support.

Spec sheet

What it does
RelayKit captures, inspects, verifies, stores, and forwards webhook events from third-party services.Read 8 Oct 2026 · relaykit.io
Integrations
Inbound signature verification supports Stripe, GitHub, Shopify, Twilio, SendGrid, Paddle, Clerk, and Resend.Read 8 Oct 2026 · relaykit.io
Security
The service offers inbound signature verification, IPv4 and IPv6 IP allowlisting, configurable rate limits, and audit records for rejected requests.Read 8 Oct 2026 · relaykit.io
Support
The Team plan includes priority support.Read 8 Oct 2026 · relaykit.io
Fan-out
RelayKit can deliver each incoming webhook to multiple destinations in parallel, tracking and retrying each destination independently.Read 8 Oct 2026 · relaykit.io
Local development
The published @relaykit/cli can forward webhooks to a local development server; the documentation says it requires Node.js 18 or later.Read 8 Oct 2026 · relaykit.io
Operator
The terms state that RelayKit is operated by IOGravity.Read 8 Oct 2026 · relaykit.io
Payload handling
RelayKit says it forwards the original request body and headers without modifying them, apart from specified hop-by-hop headers.Read 8 Oct 2026 · relaykit.io
Plan limits
The listed monthly webhook allowances are 1,000 for Hobby, 100,000 for Pro, and 500,000 for Team.Read 8 Oct 2026 · relaykit.io
Retries and replay
RelayKit automatically retries failed deliveries, with up to 20 attempts, and supports manual replay.Read 8 Oct 2026 · relaykit.io
Schema monitoring
Schema Sentinel detects changes in webhook payload structure and is listed as a Team feature.Read 8 Oct 2026 · relaykit.io
Who it is for
The maker describes Hobby as suited to side projects and local development, Pro to solo developers shipping real products, and Team to teams with serious webhook volume.Read 8 Oct 2026 · relaykit.io

Plans and prices

Hobby Free 1,000 webhooks/month · 1 project · 24-hour log retention · signature verification · manual replay · local dev tunnel CLI Read 8 Oct 2026 · relaykit.io
Pro $9 a month Recurring monthly 100,000 webhooks/month · 5 projects · 30-day log retention · up to 20 retries · IP allowlisting · rate limiting · email and Slack incident alerts · fan-out routing · 14-day free trial Read 8 Oct 2026 · relaykit.io
Team $29 a month Recurring monthly 500,000 webhooks/month · 20 projects · 90-day log retention · includes Pro features · Schema Sentinel · Time Machine replay · priority support · 14-day free trial Read 8 Oct 2026 · relaykit.io

Every RelayKit plan and price →

Strong points and limits

Strong points

  • Parallel fan-out to multiple destinations
  • Automatic retries and manual replay
  • Signature verification for eight listed providers
  • IP allowlisting and configurable rate limits
  • Free Hobby plan available

Limits

  • Cloud deployment only
  • CLI requires Node.js 18 or later
  • Monthly webhook allowances vary by plan
  • Schema Sentinel is a Team feature

Who it suits

RelayKit suits developers handling third-party webhooks, from side projects and local development to products with substantial webhook volume. The listed plan descriptions position Hobby for small projects, Pro for solo developers, and Team for teams.

Verdict

RelayKit centralizes webhook verification, delivery, retries, and replay with plan-based volume limits. Its provider coverage and independent destination handling are useful, while advanced monitoring is reserved for Team.

Where Specifiction places it

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