SignaKit
Feature flags & A/B testing for engineering teams
Details
- Follow on
- @signakit
- Categories
- Developer ToolsAnalytics & Monitoring
- Target Audience
- DevelopersSoftware DevelopersStartups
- Pricing
- Freemium from $39
- Platforms
- Web
- Alternative To
LaunchDarkly
Posthog
About SignaKit
SignaKit is a feature flags, A/B testing, and experimentation platform for engineering teams that need full control over software releases without per-seat pricing or vendor lock-in. Flags are evaluated locally inside the application process using a cached configuration served from AWS CloudFront, producing sub-millisecond evaluation with no network roundtrip on the hot path ā bucketing is deterministic via MurmurHash3, so the same user always receives the same variant across sessions and devices. Teams can create boolean and multivariate flags with percentage rollouts, audience targeting by any user attribute, and instant kill switches for emergency rollbacks. Built-in A/B testing tracks statistical significance with configurable experiment snapshot intervals, and multi-armed bandit optimization automatically shifts traffic toward the winning variant as results accumulate ā included on every plan, including Free.
Product Insights
SignaKit provides a sub-millisecond feature flag and experimentation platform designed for engineering teams through a freemium model. It integrates local flag evaluation via AWS CloudFront with tools for boolean rollouts, multivariate testing, and multi-armed bandit optimization.
- Zero-latency flag evaluation via deterministic local processing and CloudFront caching.
- Integrated multi-armed bandit optimization included on all tiers, including the free plan.
- Extensive SDK support for React, Node, Python, Laravel, Go, Swift, and Flutter.
- Predictive usage-based pricing with no per-seat restrictions for engineering teams.
Ideal for: Developers and startups requiring high-performance feature management and A/B testing without seat-based cost scaling.
SignaKit serves as an alternative to enterprise solutions like LaunchDarkly and analytics platforms such as Posthog.
Screenshots
Product Updates (1)
Launch Day!
I'm Robbie, founder of SignaKit. I built this after spending years on engineering teams that were either paying thousands a month for LaunchDarkly or duct-taping feature flags together with environment variables. SignaKit gives you: - ~0.2ms flag evaluation (edge-ready, no latency cost) - Built-in A/B testing & experimentation with statistical significance alerts - SDKs for Node, React, React Native, Browser, Python, PHP, Laravel, Flutter, Go, Swift, and Java - Usage-based pricing ā Starter is $39/month for 5M evaluations It's the tool I always wished existed: powerful enough for serious experimentation, simple enough to set up in an afternoon, and priced for teams that aren't yet enterprise. Free tier available. No credit card required to start. Happy to answer any questions ā I'll be here all day.
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Comments (1)
At $39/month for 5M evaluations, how does overage work? Hard cap, pay-per-extra-million, or auto-upgrade to next tier?
@ashishdurgude For the paid plans, overage is $2 per additional 1M events. So if you went over, the next billing cycle you will get a separate invoice for the overage amount.