Flagsmith vs Inngest
Open-source feature flags + remote config — SaaS, private cloud, self-host
vs. Durable functions + event-driven workflows for modern apps
Pricing tiers
Flagsmith
Free
$0. 50,000 API requests/mo. 1 team member. Unlimited flags. Community support.
Free
Self-hosted
$0 (OSS). Host yourself via Docker/K8s. Fair-source license (non-compete).
$0 base (usage-based)
Start-up
$40/mo. 1,000,000 API requests/mo. 3 team members. Standard support.
$40/mo
Scale-up
$200/mo. 5,000,000 API requests. 10 team members. Priority support + SLA.
$200/mo
Enterprise
Custom. Unlimited API requests, SSO, SAML, RBAC, audit logs, on-prem.
Custom
Inngest
Free
$0. 50K steps/mo + 1K concurrent executions. 7-day log retention. 1 environment.
Free
OSS (self-host)
Free forever. Inngest Dev Server + self-hosted Inngest runtime. Apache 2.0.
$0 base (usage-based)
Starter
$20/mo. 250K steps/mo. 5K concurrency. 14-day retention. 3 envs.
$20/mo
Pro
$75/mo. 1M steps/mo. 10K concurrency. 30-day retention. Priority support.
$75/mo
Enterprise
Custom. SSO, HIPAA, dedicated clusters, self-host with Inngest Enterprise.
Custom
Free-tier quotas head-to-head
Comparing free on Flagsmith vs free on Inngest.
| Metric | Flagsmith | Inngest |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
Flagsmith · 14 features
- A/B Testing — Multivariate flag splits.
- Audit Log — Full history of flag changes.
- Change Requests — Approval workflow for flag changes.
- Edge API — Global low-latency flag eval.
- Feature Flags — Boolean + multivariate + JSON flags.
- Local Evaluation — Server SDKs eval flags locally — no per-req API call.
- Percentage Rollouts — Gradual traffic ramp.
- Remote Config — Non-boolean config values.
- Role-Based Access — Fine-grained permissions.
- Scheduled Flags — Time-based flag changes.
- Segments — Rule-based targeting.
- Self-Hosting — Docker/Helm install.
- SSO + SAML — Enterprise SSO.
- Webhooks — Outbound event streaming.
Inngest · 14 features
- AgentKit — Build AI agents as durable Inngest functions.
- Auto Retries — Configurable retries with exponential backoff.
- Concurrency Controls — Per-function and per-user concurrency limits.
- Cron Triggers — Scheduled functions via cron syntax.
- Debounce — Coalesce rapid-fire events into one execution.
- Dev Server — Local Inngest runtime for dev.
- Durable Steps — step.run, step.sleep, step.waitForEvent.
- Event System — Typed events with schemas.
- Fan Out / Batching — Process many events in parallel with batch control.
- Priority Lanes — Route premium customers to faster execution.
- Rate Limiting — Throttle events per key.
- Realtime — Stream function output to clients.
- Replay — Re-run past functions with new code.
- Self-Host — OSS runtime — run your own Inngest.
Developer interfaces
| Kind | Flagsmith | Inngest |
|---|---|---|
| CLI | Flagsmith CLI | inngest-cli (dev server) |
| SDK | flagsmith-android, flagsmith-go, flagsmith-ios, flagsmith-java, flagsmith-js (browser), flagsmith-nodejs, flagsmith-python, flagsmith-ruby | inngestgo, inngest (Python), inngest (TS/Node) |
| REST | Flagsmith REST API | Inngest REST API |
| MCP | — | Inngest MCP |
| OTHER | Flagsmith Dashboard, Flagsmith Webhooks | Inngest Cloud Dashboard |
Staxly is an independent catalog of developer platforms. Outbound links to Flagsmith and Inngest are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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