Inngest is a workflow orchestration platform that replaces traditional queues, state management, and scheduling with durable step functions. You write functions using the Inngest SDK in TypeScript, Python, or Go, and each step is automatically checkpointed, retried on failure, and observable. It works on serverless, containers, or the edge with no separate infrastructure to deploy. Teams use it for AI agent orchestration, background jobs, scheduled tasks, and complex multi-step workflows that need to run reliably at scale.

• Durable Execution Engine: Each workflow runs with built-in checkpoints at every step. If a step fails midway, execution resumes exactly where it stopped instead of restarting from the beginning. This prevents duplicate work and keeps state intact across retries, deploys, and failures.
• Zero Infrastructure Required: No Redis, RabbitMQ, SQS, or worker processes to manage. Add the SDK to your existing app and get reliable background processing immediately.
• AI & Agent Workflow Orchestration: Orchestrate multi-model AI workflows with built-in retries, timeouts, and observability. Handle non-deterministic LLM processes gracefully in production.
• Built-in Flow Control: Concurrency limits, throttling, debouncing, rate limiting, prioritization, and idempotency are all available as SDK-level primitives.
• Visual Debugging & Observability: A local dev server shows function execution in real-time with visual timelines for events, step outputs, and failures. Production traces capture nested API requests and database queries.
• Event-Driven Architecture: Functions are triggered by events from APIs, webhooks, schedules, or custom triggers. Workflows can pause and resume using events, enabling flexible long-running processes without polling or cron jobs.
• Multi-Language SDKs: Official SDKs for TypeScript, Python, and Go. Call functions across languages in multi-service architectures.
• Replay Failed Runs: Fix your code, then replay a failed function from the exact failure point with one click. No dead letter queues to manage.

• Outstanding Developer Experience: The step function model, local dev server, and visual debugging tools make building and testing workflows straightforward and fast.
• No Infrastructure Overhead: Works on your existing compute (Vercel, AWS Lambda, Cloudflare, containers) with zero queue or worker setup, which is a major win for small teams.
• Reliable Failure Handling: Automatic retries per step with checkpointing means partial failures don't restart entire workflows from the beginning.
• Strong AI Workflow Support: Purpose-built features for orchestrating LLM calls, multi-agent systems, and long-running AI processes with full observability.
• Generous Free Tier: 50K executions per month and up to 5M events per day at no cost, enough to evaluate and run small production workloads.
• Framework Agnostic: Works with Next.js, Remix, Express, FastAPI, Go, and more without requiring a separate deployment pipeline.

• Vendor Lock-In Risk: Your workflow logic is tightly coupled to Inngest's SDK and execution model. Self-hosting is available but adds operational complexity.
• Free Tier Concurrency Limits: The 5-concurrent-step limit on the free plan makes real-world parallel workflows difficult, pushing most teams to upgrade quickly.
• Usage-Based Step Pricing Scales with Complexity: Since billing is tied to executions and steps, highly granular workflows can become expensive at large scale.
• Serverless Cold Start Latency: Since Inngest calls your functions via HTTP, serverless cold starts can add noticeable latency to workflow execution.

• AI Agent Orchestration: Build multi-step AI agent workflows that call different LLM providers, external tools, and data sources. Inngest handles retries and checkpointing so your agent pipelines recover from failures without restarting from scratch.
• E-Commerce Order Processing: Coordinate payment processing, inventory checks, shipment scheduling, and notification emails as durable step functions. Each stage retries independently, so a temporary payment gateway timeout doesn't restart your entire order flow.
• Background Job Processing: Move long-running tasks like PDF generation, data imports, or media processing out of your request path. Inngest queues and executes them reliably without you deploying separate worker infrastructure.
• Drip Campaign & Email Workflows: Build behavior-driven email sequences that sleep between steps for days or weeks. Inngest pauses execution and resumes at the right time without keeping processes running.
• Scheduled Tasks & Cron Jobs: Replace fragile cron setups with Inngest's built-in scheduling. Define recurring functions in code, and get observability into every run with automatic retries on failure.
• User-Facing Workflow Engines: Build custom workflow automation features for your SaaS product. Let your users define triggers and actions while Inngest handles the durable execution, concurrency control, and scaling behind the scenes.