Open-source LLM observability and AI gateway that logs requests, tracks cost and latency, and routes to 100+ models through one API.
Freemium
Inngest
Open-source SDK and cloud for durable background jobs, event-driven workflows and AI agents without queue infrastructure.
What is Inngest?
Inngest is an open-source SDK, with a managed cloud, for running event-driven functions that survive failures. You split work into steps, trigger functions from events, and Inngest takes care of retries, sleeping and resuming, fan-out and flow control. A run that fails midway picks up from the failed step instead of starting over, and each run can wait for another event or sleep for as long as a year within the plan's run-length cap. Traces and logs for every step show up in the Inngest dashboard. Code samples in the docs cover TypeScript, Go and Python, and you can start locally before moving to the Cloud. The same model is used for background jobs, long workflows and AI agents, and a newer sandbox product bills compute by the second. Inngest pricing starts with a Free plan at $0/mo, then Pro from $99/mo, Business from $499/mo and custom Enterprise.
Use cases
- Run background jobs with retries
- Orchestrate AI agent workflows
- Fan out work across many functions
- Pause a workflow and resume later
- Wait for an event inside a function
- Control concurrency and rate limits
- Score and evaluate agent runs
Who it's for
Why use Inngest
- Failures resume from the step that failed, so completed work isn't repeated.
- You don't need to run your own queue, scheduler or worker fleet to get retries and delays.
- Step-level traces make it easier to see where a run went wrong.
- The Free plan needs no credit card, so you can test before paying for production.
Inngest features
- Step-based durable functions with automatic retries
- Event triggers and fan-out to multiple functions
- Sleep and wait-for-event steps within a run
- Rate limiting, throttling and concurrency controls
- Per-step traces and logs in the dashboard
- SDKs with TypeScript, Go and Python examples
- Local development before moving to Cloud
- Agent Evals scoring, currently in beta
- Sandboxes billed per second for vCPU and memory
- Datadog and advanced observability add-on
Inngest integrations
How to get started with Inngest
- Install the Inngest SDK for your language and start the local development server.
- Write a function with an event trigger and wrap each unit of work in a step.
- Send events to trigger runs and test retries and sleeps locally.
- Deploy your app and connect it to Inngest Cloud.
- Follow runs, step results and retries in the dashboard and upgrade the plan as usage grows.
Inngest limitations
- Free plan allows 50k executions and 5 concurrent steps
- Free plan keeps 24 hours of trace history
- A function can have at most 1000 steps
- Step timeouts are capped at 2 hours and also limited by your host
- Code must be structured as event-driven steps
Inngest pricing
Yes, Inngest has a free plan. Paid plans start at $99 per month, according to the official pricing page on .
Inngest plans
Free
$0/mo
No credit card required
- 5 seats
- 50k executions
- 5 concurrent steps
- 500k events ingested
- 24 hour trace history
Pro
Starting at $99/mo
- 15 seats
- 1M executions + add-on
- 100+ concurrent steps
- 5M+ events ingested
- 7 day trace history
- HIPAA add-on
Business
Starting at $499/mo
- 30 seats
- 10M executions + add-on
- 500 concurrent steps
- 50M+ events ingested
- 14 day trace history
- 1 minute metrics granularity
Enterprise
Custom
- Custom seats and executions
- 90 day trace history
- SAML, RBAC, audit trails
- HIPAA included
- Dedicated Slack channel
- Dedicated account management
Plans as listed on the official pricing page on . Prices can change and may vary by country or exclude tax. Check the official pricing page.
Inngest alternatives
The main Inngest alternatives listed on Debuly are Trigger.dev, Hatchet, Windmill, Inferable, Agent Development Kit (ADK) and Agent Skills. The table compares pricing and platforms; order is A–Z.
| Tool | Pricing | Starting price | Platforms |
|---|---|---|---|
| Inngest | Freemium | $99/mo | Web, CLI, Self-hosted |
| Agent Development Kit (ADK) | Open source | — | CLI, Self-hosted, API |
| Agent Skills | Open source | — | — |
| Hatchet | Freemium | — | Web, API, Self-hosted |
| Inferable | Freemium | $10/mo | Web, API, Self-hosted |
| Trigger.dev | Freemium | $10/mo | Web, API, CLI, Self-hosted |
| Windmill | Freemium | — | Web, Self-hosted, Docker, Kubernetes |
Agent Development Kit (ADK)
Google's open-source, code-first Python framework for building, testing and deploying AI agents and multi-agent workflows.
Agent Skills
Open standard for packaging instructions, scripts and references in a SKILL.md folder that AI agents load on demand.
Open sourceVisit Agent Skills (official site)
Hatchet
Task and workflow orchestration engine for background jobs and AI agents, with durable execution and pay-as-you-go cloud pricing.
FreemiumVisit Hatchet (official site)Inferable
Durable workflow runtime for AI agents, with structured LLM output and workflows that run on your own compute.
FreemiumVisit Inferable (official site)
Trigger.dev
Open-source platform for durable AI agents and background workflows in TypeScript, with no timeouts, retries, queues and realtime.
Windmill
Open-source, self-hostable platform for building internal tools, workflows and data pipelines as code.
FreemiumVisit Windmill (official site)
Inngest FAQ
How much does Inngest cost?
Free is $0/mo with no credit card required. Pro starts at $99/mo and Business starts at $499/mo. Enterprise pricing is custom, so you need to contact Inngest.
Is there a free plan for Inngest?
Yes. Free includes 5 seats, 50k executions, 5 concurrent steps, 500k events ingested and 24 hour trace history.
What plans does Inngest have?
Free, Pro, Business and Enterprise. Higher plans raise executions, concurrency, event size and trace history, and add options such as a HIPAA add-on and SAML, RBAC and audit trails on Enterprise.
Is Inngest open source?
Yes, in part. According to its pricing page, Inngest is an open-source SDK for building event-driven apps and agents. You can start locally and move to Inngest Cloud when you are ready for production.
Which languages does Inngest support?
The documentation shows examples in TypeScript, Go and Python.
Does Inngest work with AI agents?
Yes. Inngest positions itself for agents as well as background jobs, and it offers Agent Evals for scoring runs, which is in beta.
What are alternatives to Inngest?
Alternatives include Trigger.dev, Temporal, Hatchet and Windmill.
Sources & verification
Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.
| Source | Type | Accessed |
|---|---|---|
| inngest.com/ | official | |
| inngest.com/pricing | pricing | |
| inngest.com/docs/usage-limits/inngest | docs | |
| inngest.com/docs/usage-limits/inngest.md | docs | |
| inngest.com/docs/agent-evals/limits | docs |
Image credits
- Logo: from inngest.com · fetched · Vendor trademark, used only to identify the product; removed on request
- Cover: none collected yet, so a generated tile is shown.
Spot an error? Report an issue with this listing. We also remove a logo or image on the owner's request.
More in Developer platforms 4
All developer platforms toolsMIT-licensed memory engine from Vectorize that lets AI agents retain, recall and learn from experience, self-hosted or as a managed cloud.
Open sourceOpen-source recorder for coding agent runs that replays them offline and forks them from any step onto a different model.
Open sourcePay-as-you-go Perplexity API for web-grounded answers, ranked search results, embeddings and typed decisions, with an OpenAI-compatible endpoint.
Paid
