# BuildStack.ai — full listing dump

> Fuller machine-readable companion to llms.txt. Includes every listing field summary and the featured (sponsored) flag. Facts verified 2026-10-19. Editorial independence: featured=true is paid placement only; capability marks are unchanged by payment.

## Featured listings (sponsored)
Paid placement: [Get featured — USD 500/month](https://buy.stripe.com/9B614m7bv8sl3iLbhx9IQ00). Featured listings sort to the top of the category with a Sponsored label.

## Category: Inbound webhook reliability and payload routing
- Slug: inbound-webhook-reliability
- Count: 19
- Verified on: 2026-10-19 (Asia/Singapore)
- Dataset: https://getbuildstack.ai/data/webhook-reliability.json
- Dataset CSV: https://getbuildstack.ai/data/webhook-reliability.csv

## Listings

### Hookdeck Event Gateway
- id: hookdeck
- featured: false
- url: https://hookdeck.com
- type: SaaS
- description: Managed event gateway for receiving, verifying, queueing, filtering, transforming and routing inbound webhooks, with full request/event/attempt logs.
- free_tier: Yes: Developer plan $0/month, 10,000 events, 3-day retention, 1 user
- starting_price: Team from $39/month (pay-as-you-go events); Growth from $499/month; Enterprise custom
- pricing_model: Base plan + metered events ($3.00 per 100k up to 5M/month, tiered down); retries included in event price
- license: Apache-2.0 (CLI only)
- github: https://github.com/hookdeck/hookdeck-cli (stars: 365 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=yes, fan_out=yes, transformation=yes, replay=yes, observability=yes, agent_llm=yes
- best_fit: Engineering teams consuming many third-party webhooks (Stripe, Shopify, GitHub, AI providers) who want a managed buffer in front of their app or agents.
- notes: Retries up to a week / 50 attempts; 180+ pre-configured Source Types with signature verification (incl. OpenAI, Claude, Gemini, ElevenLabs, Replicate); one Source fans out to many Connections; JS transformations; dedup; delivery rate limits and per-tenant delivery groups; Issues + Metrics (Datadog/New Relic/Prometheus export on Growth); destination timeouts up to 15 min for AI agents; MCP server and agent skills.

### Svix (Ingest + Dispatch)
- id: svix
- featured: false
- url: https://www.svix.com
- type: Both
- description: Webhooks platform: Svix Ingest for receiving webhooks at scale, Dispatch for sending, plus Play for testing; core server is open source.
- free_tier: Yes: $0/month, up to 50k messages/month, 7-day retention, Ingest included
- starting_price: Basic from $20/month; Professional from $490/month; Enterprise custom
- pricing_model: Base plan + $0.0001 per additional message; retries and filtered messages free; each 64 KiB chunk billed as one message
- license: MIT
- github: https://github.com/svix/svix-webhooks (stars: 3453 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=yes, fan_out=yes, transformation=yes, replay=yes, observability=yes, agent_llm=unknown
- best_fit: SaaS vendors that both send webhooks to customers and receive third-party webhooks; teams wanting an MIT self-host option.
- notes: Ingest: automatic and manual retries, built-in webhook verification, configurable throttling for spikes, JS filter/transform/route. Dispatch: consumer portal, signature libraries, OpenTelemetry streaming (Enterprise), FIFO and broker/object-storage endpoints on higher tiers. Steering member of Standard Webhooks.

### Convoy
- id: convoy
- featured: false
- url: https://getconvoy.io
- type: Both
- description: Cloud-native webhook gateway for sending outgoing and receiving incoming webhooks, self-hosted open source or Convoy Cloud.
- free_tier: Yes: Community edition, self-hosted, $0 forever; 14-day Premium trial (Cloud trial: 100 events/day)
- starting_price: Premium $999/month (self-hosted); Enterprise contact sales
- pricing_model: Flat monthly price with throughput limits; no per-message metering
- license: Custom/other (GitHub reports NOASSERTION)
- github: https://github.com/frain-dev/convoy (stars: 2880 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=unknown, fan_out=unknown, transformation=yes, replay=unknown, observability=yes, agent_llm=unknown
- best_fit: Platform teams that must run webhook infrastructure inside their own cloud/on-prem for data control and compliance.
- notes: Incoming & outgoing webhooks, automatic retries, message broker support (Community); JS transformation, OpenTelemetry export, RBAC, endpoint circuit breaking, white-labelling (Premium).

### WebhookX
- id: webhookx
- featured: false
- url: https://webhookx.io
- type: Open source
- description: Open-source webhook gateway (Go) for receiving, validating, transforming and delivering events at scale, with plugins.
- free_tier: Yes: open source; free production licenses for eligible non-commercial use
- starting_price: unknown (commercial license pricing not published)
- pricing_model: Open core with license-gated features
- license: Apache-2.0 (some features require a license)
- github: https://github.com/webhookx-io/webhookx (stars: 300 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=yes, fan_out=yes, transformation=yes, replay=unknown, observability=unknown, agent_llm=unknown
- best_fit: Teams wanting a self-hosted, Kong-style gateway for webhooks.
- notes: Automatic retries with configurable delays; fan-out by event type; rate limiting; JSON Schema event validation; hmac-auth/basic-auth/key-auth inbound plugins; JS function plugin for custom signature verification; WASM transforms; HMAC-signed outbound.

### Upstash QStash
- id: qstash
- featured: false
- url: https://upstash.com/docs/qstash
- type: SaaS
- description: Serverless HTTP message queue and scheduler that durably delivers messages to your endpoints with retries, DLQ and URL-group fan-out.
- free_tier: Yes: $0/month, 1,000 messages/day
- starting_price: Pay-as-you-go $1 per 100K messages; Fixed 1M $180/month; Fixed 10M $420/month; Enterprise custom
- pricing_model: Per-message (PAYG) or fixed daily-capacity plans. Note: page header says retries are free, but its FAQ says each delivery attempt (incl. retries) is billed — confirm with vendor.
- license: MIT (SDK)
- github: https://github.com/upstash/qstash-js (stars: 270 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=unknown, fan_out=yes, transformation=unknown, replay=unknown, observability=yes, agent_llm=unknown
- best_fit: Serverless/edge apps (Vercel, Cloudflare) that need to buffer an inbound webhook and re-deliver it reliably to a function.
- notes: DLQ (3 days–3 months by plan), URL groups/topics for fan-out, delays up to 1 year+, parallelism limits instead of RPS caps, Prometheus/Datadog via Prod Pack add-on.

### Amazon EventBridge
- id: eventbridge
- featured: false
- url: https://aws.amazon.com/eventbridge/
- type: SaaS
- description: AWS serverless event bus with partner event buses for SaaS events, API destinations for HTTP delivery, Pipes for filter/transform/enrich, and archive & replay.
- free_tier: Partial: AWS management events ingested free; Scheduler free tier 14M invocations/month; Schema Discovery 5M events/month free
- starting_price: No minimum; e.g. classic custom events $1.00 per million; API destinations $0.20 per million; Pipes $0.40 per million requests (as stated in examples)
- pricing_model: Pure usage-based, billed per event / 64 KB chunk
- license: Proprietary (AWS)
- github: — (stars: — as of None)
- capabilities: retries=yes, signature_verification=unknown, fan_out=yes, transformation=yes, replay=yes, observability=unknown, agent_llm=unknown
- best_fit: AWS-native organisations routing SaaS and internal events across accounts.
- notes: Rules fan out to many targets; retry policies; JSONata transformation and schema validation on enhanced buses; Pipes filter/enrich; archive & replay; API destinations deliver to any HTTPS endpoint incl. via PrivateLink.

### Inngest
- id: inngest
- featured: false
- url: https://www.inngest.com
- type: Both
- description: Durable workflow/agent orchestration platform that can receive provider webhooks directly, transform them into events and start durable functions.
- free_tier: Yes: $0/month, 50k executions, 500k events ingested
- starting_price: Pro from $99/month; Business from $499/month; Enterprise custom
- pricing_model: Plan + metered executions/events/concurrency; self-hosting available
- license: Custom/other (GitHub reports NOASSERTION)
- github: https://github.com/inngest/inngest (stars: 5959 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=no, fan_out=unknown, transformation=yes, replay=unknown, observability=yes, agent_llm=yes
- best_fit: TypeScript/Python teams that want webhooks to directly trigger durable, retried workflows and AI agents without a webhook handler.
- notes: Webhook URLs with server-side transforms, content-type support, request filtering and branch-environment routing. Docs state Inngest does NOT verify provider webhook signatures — your function must. Step-level retries, traces, durable agents.

### Trigger.dev
- id: triggerdev
- featured: false
- url: https://trigger.dev
- type: Both
- description: Open-source platform for durable background tasks and AI agents; Webhooks (private beta) receive provider webhooks on hosted, verified endpoints and route them to tasks, agents and waiting runs.
- free_tier: Yes: $0/month with $5/month free credits, 20 concurrent runs
- starting_price: Hobby $10/month; Pro $50/month; Enterprise custom
- pricing_model: Plan with included credits + per-second compute + $0.25 per 10,000 runs
- license: Apache-2.0
- github: https://github.com/triggerdotdev/trigger.dev (stars: 16570 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=yes, fan_out=unknown, transformation=unknown, replay=unknown, observability=yes, agent_llm=yes
- best_fit: TypeScript teams running long-lived AI agents that must be woken by external events (Slack, Linear, Stripe, GitHub).
- notes: Webhooks feature is private beta: hosted verified endpoints, sources & verification, filters, waiters, session routing to agents. Durable tasks with no timeouts, alerts, log retention by plan, Realtime streaming.

### Hatchet
- id: hatchet
- featured: false
- url: https://hatchet.run
- type: Both
- description: Open-source orchestration engine for background tasks, AI agents and durable workflows, with webhook endpoints that trigger runs.
- free_tier: Yes: 1M runs and 1M events free every month
- starting_price: Pay-as-you-go: $30 per million runs, $5 per million events after free tier; custom plans for 100M+ runs
- pricing_model: Usage-based; retries not billed
- license: MIT
- github: https://github.com/hatchet-dev/hatchet (stars: 8139 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=yes, fan_out=unknown, transformation=unknown, replay=unknown, observability=yes, agent_llm=yes
- best_fit: Teams replacing Celery/Temporal who want webhooks to start durable, rate-limited agent workflows.
- notes: Webhooks with basic auth, API key or HMAC validation (algorithm/encoding configurable) mapped to event keys via CEL; retry policies, rate limits, concurrency, idempotency; OpenTelemetry and Prometheus metrics.

### ngrok
- id: ngrok
- featured: false
- url: https://ngrok.com
- type: SaaS
- description: Ingress/API gateway that gives local or private services public HTTPS endpoints, with traffic inspection, webhook replay and a verify-webhook traffic policy action.
- free_tier: Yes: $0 with $5 one-time usage credit, 3 endpoints, 20k HTTP/S requests
- starting_price: Hobbyist $10/month; Pay-as-you-go $20/month + usage; Enterprise custom
- pricing_model: Plan with included usage credit + metered requests/data transfer/endpoint hours
- license: MIT (ngrok-go SDK)
- github: https://github.com/ngrok/ngrok-go (stars: 880 as of 2026-10-19)
- capabilities: retries=unknown, signature_verification=yes, fan_out=unknown, transformation=unknown, replay=yes, observability=yes, agent_llm=yes
- best_fit: Developers building and debugging webhook handlers locally; teams wanting edge signature verification before traffic reaches the app.
- notes: Test webhooks on localhost; Traffic Inspector shows headers/body/response and lets you replay requests; verify-webhook Traffic Policy action validates provider signatures at the edge; AI Gateway and MCP connectivity listed in product nav. Not a durable queue.

### Webhook.site
- id: webhook-site
- featured: false
- url: https://webhook.site
- type: Both
- description: Instant unique URLs and email addresses to inspect, test, transform and forward webhooks; Custom Actions add workflows on every hit.
- free_tier: Yes: free URLs expire after 7 days and accept a limited number of requests
- starting_price: Basic $9/month; Pro $19/month; Enterprise $69/month (USD, excl. VAT)
- pricing_model: Flat subscription, no per-execution fee
- license: Custom/other (GitHub reports NOASSERTION)
- github: https://github.com/webhooksite/webhook.site (stars: 6775 as of 2026-10-19)
- capabilities: retries=unknown, signature_verification=unknown, fan_out=unknown, transformation=yes, replay=yes, observability=yes, agent_llm=unknown
- best_fit: Developers and QA testing webhook integrations; light production forwarding.
- notes: Real-time request inspector, Replay/Redirect/XHR actions, Custom Actions to transform and forward, CLI forwarding to localhost, CSV export, API. FAQ cites 400,000 monthly unique users (Nov 2025).

### smee.io
- id: smee
- featured: false
- url: https://smee.io
- type: Both
- description: Free webhook payload delivery service from the Probot team that proxies payloads to your locally running app over Server-Sent Events.
- free_tier: Yes: free hosted service
- starting_price: Free
- pricing_model: Free
- license: ISC (client)
- github: https://github.com/probot/smee-client (stars: 561 as of 2026-10-19)
- capabilities: retries=no, signature_verification=no, fan_out=no, transformation=no, replay=unknown, observability=unknown, agent_llm=no
- best_fit: Developers testing GitHub and other webhooks locally.
- notes: Development-only localhost forwarding, popular with GitHub App/Probot developers.

### n8n
- id: n8n
- featured: false
- url: https://n8n.io
- type: Both
- description: Fair-code workflow automation with Webhook and Respond to Webhook nodes plus native AI agent, MCP and LLM nodes.
- free_tier: Self-hosted community edition; cloud plans offer free trial
- starting_price: Starter €20/month billed annually (2.5K executions); Pro €50/month billed annually; Business €667/month billed annually
- pricing_model: Per workflow execution, unlimited steps/users
- license: Fair-code (GitHub reports NOASSERTION)
- github: https://github.com/n8n-io/n8n (stars: 207961 as of 2026-10-19)
- capabilities: retries=unknown, signature_verification=unknown, fan_out=yes, transformation=yes, replay=unknown, observability=yes, agent_llm=yes
- best_fit: Technical ops teams building webhook-triggered AI automations, self-hosted or cloud.
- notes: Webhook trigger node, Respond to Webhook, Switch/If routing, Code and AI Transform nodes, AI agents and MCP Server/Client nodes, insights on paid tiers.

### Webhooks by Zapier
- id: zapier-webhooks
- featured: false
- url: https://zapier.com/apps/webhook/integrations
- type: SaaS
- description: Catch Hook / Catch Raw Hook triggers that give each Zap a unique URL to receive webhooks and route the payload into 9,000+ apps.
- free_tier: Plan-dependent: help center lists webhook triggers on Free, Professional, Team and Enterprise; pricing page lists 'Webhooks' as a Professional feature — confirm
- starting_price: Professional from $19.99/month; Team from $69/month
- pricing_model: Per-plan task allowances
- license: Proprietary
- github: — (stars: — as of None)
- capabilities: retries=unknown, signature_verification=unknown, fan_out=unknown, transformation=yes, replay=yes, observability=unknown, agent_llm=yes
- best_fit: Ops and no-code teams routing inbound webhooks into business apps.
- notes: Catch Raw Hook includes headers and unparsed body (max 2 MB); Autoreplay listed in plan features; multi-step Zaps transform/route data; Zapier MCP and Agents products.

### Pipedream
- id: pipedream
- featured: false
- url: https://pipedream.com
- type: Both
- description: Integration platform with 3,000+ connectors, prebuilt triggers and MCP servers for adding integrations and event triggers to apps and AI agents.
- free_tier: Yes: $0, every feature in development (no production)
- starting_price: Startup $99/month billed annually ($150 monthly); Business custom
- pricing_model: Plan + external users ($2 each over 100) + usage credits ($0.012 each over 10,000)
- license: Custom/other (GitHub reports NOASSERTION)
- github: https://github.com/PipedreamHQ/pipedream (stars: 11752 as of 2026-10-19)
- capabilities: retries=unknown, signature_verification=unknown, fan_out=unknown, transformation=unknown, replay=unknown, observability=unknown, agent_llm=yes
- best_fit: Product teams embedding third-party integrations and event triggers into their own app or agent.
- notes: 10,000+ prebuilt tools and triggers; deployed triggers emit events; MCP servers and Connect proxy for agents; SOC 2 Type 2. Webhook-specific reliability features not verified.

### Windmill
- id: windmill
- featured: false
- url: https://www.windmill.dev
- type: Both
- description: Open-source developer platform that auto-generates webhook endpoints for every script and flow, turning scripts into webhooks, workflows and UIs.
- free_tier: Yes: open source, self-host, unlimited executions
- starting_price: Enterprise listed 'from $120/mo' (seat-based)
- pricing_model: Free OSS + seat-based Enterprise (developers / operators)
- license: Custom/other (GitHub reports NOASSERTION)
- github: https://github.com/windmill-labs/windmill (stars: 18219 as of 2026-10-19)
- capabilities: retries=unknown, signature_verification=yes, fan_out=unknown, transformation=yes, replay=unknown, observability=yes, agent_llm=unknown
- best_fit: Internal-tools and platform teams wanting code-first webhook handlers without deploying services.
- notes: Async, sync and SSE webhook endpoints per script/flow; version-pinned flow webhooks; raw_string payload for DIY signature verification; multipart uploads; run history in Runs menu.

### Hook0
- id: hook0
- featured: false
- url: https://www.hook0.com
- type: Both
- description: Open-source (SSPL-1.0) webhook server and EU-hosted cloud for providing webhooks to your users, with retries, HMAC signing and delivery logs.
- free_tier: Yes: Developer plan free forever, up to 100 events/day, 7-day retention
- starting_price: Startup €59/month; Pro €190/month; dedicated on-prem Pro €1,000 setup + €500/month
- pricing_model: Plan tiers with daily event quotas; overage billed per event (never blocked on paid plans); retries free
- license: SSPL-1.0 (per vendor pricing page)
- github: https://github.com/hook0/hook0 (stars: 1499 as of 2026-10-19)
- capabilities: retries=yes, signature_verification=yes, fan_out=yes, transformation=unknown, replay=unknown, observability=yes, agent_llm=unknown
- best_fit: EU-centric SaaS vendors that need to offer webhooks to customers with data sovereignty.
- notes: Outbound-focused (sending). One event can trigger multiple subscriptions; free retries; HMAC signatures; delivery monitoring; EU hosting (France) by default; static source IPs on demand.

### Hookdeck Outpost
- id: hookdeck-outpost
- featured: false
- url: https://hookdeck.com/outpost
- type: Both
- description: Open-source outbound webhooks and event-destinations infrastructure from Hookdeck, self-hosted or managed.
- free_tier: Yes: self-hosted always free; managed first 50k events free
- starting_price: Starter $10 per million events; Growth from $499/month + $10 per million events; Enterprise custom
- pricing_model: Per-million events, plus Growth base fee
- license: Apache-2.0
- github: https://github.com/hookdeck/outpost (stars: 1067 as of 2026-10-19)
- capabilities: retries=unknown, signature_verification=unknown, fan_out=yes, transformation=unknown, replay=unknown, observability=yes, agent_llm=unknown
- best_fit: SaaS vendors adding outbound webhooks/event destinations for their customers.
- notes: Outbound/adjacent: event destinations, tenants, topics and filters, user portal, OpenTelemetry; multi-region (US, EU, Asia) on Growth.

### Standard Webhooks
- id: standard-webhooks
- featured: false
- url: https://www.standardwebhooks.com
- type: Open source
- description: Open specification and libraries for sending and verifying webhooks securely and consistently (signatures, timestamps, replay protection).
- free_tier: Free (specification + libraries)
- starting_price: Free
- pricing_model: Not applicable
- license: Apache-2.0
- github: https://github.com/standard-webhooks/standard-webhooks (stars: 1776 as of 2026-10-19)
- capabilities: retries=no, signature_verification=yes, fan_out=no, transformation=no, replay=no, observability=no, agent_llm=no
- best_fit: Any vendor emitting webhooks or engineer writing a verifier.
- notes: Spec covers security against SSRF, spoofing and replay attacks plus interoperability; steering committee includes engineers from Zapier, Twilio, Lob, Mux, ngrok, Supabase, Svix and Kong.

## How to flip featured=true
Set `"featured": true` on the buyer listing in `/data/webhook-reliability.json` and `featured=true` in the CSV. In `index.html`, move that listing's card and table row to the top, add `class="card featured"` / `class="featured"` and `data-featured="true"`, and remove or hide the Sponsored placeholder. Update this file and llms.txt Featured section with the buyer name + URL. Do not change capability facts.