SignaKit vs LaunchDarkly
For engineering teams evaluating feature flag platforms, LaunchDarkly and SignaKit will both appear on your shortlist. This page breaks down what each does well, where they differ, and which is the better fit for your team.
Last updated May 2026. Pricing and feature data verified from public sources.
Quick verdict
| SignaKit | LaunchDarkly | |
|---|---|---|
| Best for | Product/dev teams: flags + experimentation + analytics | Large enterprises: advanced release pipelines |
| Pricing model | Event-based flat rate (flag evaluations free) | Per seat + MAU charges |
| Free tier | ✓1M events/mo, 3 members | ✓2 seats only |
| Built-in analytics | ✓ | Requires separate tool |
| A/B testing | ✓All plans | Paid add-on |
| Multi-armed bandit | ✓All plans | ✕ |
| Slack notifications | ✓Starter+ | ✓ |
| SDK count | 10 | 25+ |
Feature comparison
Core feature flags
| SignaKit | LaunchDarkly | |
|---|---|---|
| Boolean flags | ✓ | ✓ |
| Multivariate flags | ✓ | ✓ |
| User/segment targeting | ✓ | ✓ |
| Percentage rollouts | ✓ | ✓ |
| Kill switches | ✓ | ✓ |
| Dark launches | ✓ | ✓ |
| Flag lifecycle management | ✓ | ✓ |
| Flag audit log | ✓ | ✓ |
| Flag scheduling | Planned | Enterprise only |
| Flag templates | — | ✓ |
| Release pipelines | — | ✓ |
| Edge support | — | ✓ |
| On-premise proxy | — | ✓ |
Experimentation & analytics
| SignaKit | LaunchDarkly | |
|---|---|---|
| A/B testing | ✓All plans | Paid add-on |
| Multivariate testing | ✓ | Paid add-on |
| Multi-armed bandit | ✓All plans | ✕ |
| Statistical significance (z-test) | ✓ | ✓With add-on |
| Confidence intervals | ✓ | ✓With add-on |
| Experiment snapshots | ✓ | ✓With add-on |
| Custom event tracking | ✓Built-in | ✕ |
| Conversion attribution | ✓ | ✓With add-on |
Developer experience
| SignaKit | LaunchDarkly | |
|---|---|---|
| Node.js SDK | ✓ | ✓ |
| Browser SDK | ✓ | ✓ |
| React SDK | ✓ | ✓ |
| PHP SDK | ✓ | ✓ |
| Laravel SDK | ✓ | — |
| Total native SDKs | 10 | 25+ |
| Flag evaluation in SDK (no server call) | ✓ | ✓ |
| REST API | ✓ | ✓ |
| CLI | — | ✓ |
| Git integration | — | ✓ |
Infrastructure & security
| SignaKit | LaunchDarkly | |
|---|---|---|
| Cloud hosted | ✓ | ✓ |
| Role-based access (Owner/Admin/Member) | ✓ | ✓ |
| Project-level access control | ✓ | ✓ |
| SSO/SAML | Planned | ✓Enterprise |
| Approval workflows | — | ✓Enterprise |
| Slack + email notifications | ✓Starter+ | ✓ |
| Webhook support | — | ✓ |
| Uptime SLA | — | 99.99% |
⚠ = restricted to a higher tier or paid add-on · — = not yet available
Pricing comparison
LaunchDarkly
As of May 2026
| Plan | Price | Limits |
|---|---|---|
| Developer | Free | 2 seats, 1 project |
| Pro | $12/seat/mo | 10k MAU included |
| Enterprise | Custom (~$70k/yr+) | Full feature access |
Watch for hidden costs: MAU overages (~$0.01–$0.03/MAU/month) kick in above 10k. Experimentation is a separate paid add-on adding 20–40% to your contract. A 10-person Pro team pays ~$1,440/yr before overages.
SignaKit
As of May 2026
| Plan | Monthly | Events/mo | Members |
|---|---|---|---|
| Free | $0 | 1M | 5 |
| Starter | $39 | 5M | 15 |
| Growth | $119 | 25M | 30 |
| Enterprise | Contact | Unlimited | Unlimited |
Flag evaluations are always free. They run locally in the SDK — no network call, no billing. Only exposure events (once per user per flag per session) and custom metric events count toward the limit.
Where each platform wins
LaunchDarkly wins
Enterprise feature depth
Release pipelines, flag templates, approval workflows, 80+ integrations, and a 99.99% uptime SLA. If your org needs Jira integration, SAML SSO, or a Relay Proxy for air-gapped environments, LaunchDarkly has them today.
SDK breadth
25+ native SDKs covers virtually every stack — Ruby, Go, Rust, Erlang, Swift, Kotlin, and more. If SignaKit doesn't have your language yet, LaunchDarkly likely does.
Scale and reliability
45 trillion flag evaluations per day with a 99.99% uptime SLA. For mission-critical systems at extreme volume, LaunchDarkly's track record is hard to argue with.
SignaKit wins
Analytics and experimentation included
LaunchDarkly tells you what shipped. SignaKit tells you what happened after — custom conversion events, confidence intervals, p-values, and experiment snapshots are built in on every plan. No add-on fee.
Multi-armed bandit on every plan
SignaKit automatically shifts traffic toward the winning variation using Thompson Sampling. LaunchDarkly doesn't offer multi-armed bandit optimization at any price.
No MAU surprise charges
LaunchDarkly's MAU overage pricing can turn a predictable $1,440/yr into a $30k+ annual contract at scale. SignaKit's event-based model is transparent: flag evaluations are free, overages are a flat rate.
Pricing that scales with usage, not headcount
A growing team doesn't trigger a bigger bill the way per-seat pricing does. A 50-person team and a 5-person team with the same traffic pay the same on SignaKit.
Who should choose which
Choose LaunchDarkly if…
- You need SAML SSO, approval workflows, or specific enterprise integrations (Jira, Salesforce, etc.)
- You need SDK coverage beyond JavaScript/PHP — Ruby, Go, Rust, Swift, Kotlin
- You need an on-premise Relay Proxy for air-gapped or latency-sensitive environments
- You're already deep in the LaunchDarkly ecosystem and the switching cost is real
Choose SignaKit if…
- You want feature flags, A/B testing, multi-armed bandit, and analytics without stitching multiple tools together
- Your team is growing and you don't want per-seat pricing scaling against you
- You're building on Node, React, Next.js, PHP, or Laravel — all SDKs are fully supported
- You want Slack alerts for experiment results and flag changes without paying enterprise prices
- You're a startup or mid-size team that needs a complete experimentation platform at a predictable cost
Migrating from LaunchDarkly to SignaKit
Switching flag platforms is lower-risk than it sounds. Feature flags are conditional logic in your codebase — migration is a controlled rollout, not a cutover.
Install SignaKit SDK alongside LaunchDarkly
Both SDKs can run in parallel. There is no downtime or forced cutover.
Shadow-evaluate flags from both platforms
For critical flags, evaluate both and compare results during the transition period.
Migrate environment by environment
Move dev → staging → production at your own pace. Each environment uses its own SDK key.
Remove the LaunchDarkly SDK
Once all flags are live in SignaKit, remove the old SDK and clean up. Most teams complete a full migration in 2–4 weeks.
Frequently asked questions
Is SignaKit a fair LaunchDarkly replacement for small teams?
For most small-to-mid teams using LaunchDarkly's core feature flagging, targeting, percentage rollouts, and kill switches — yes. And if you also want A/B testing and event analytics, SignaKit covers more ground than LaunchDarkly does at its base Pro price without any add-ons.
Does SignaKit have a free tier?
Yes — up to 1M events/month, 1 project, and 3 members. No credit card required to start.
Do flag evaluations count toward my event limit?
No. Flag evaluations happen entirely inside the SDK — no server call is made per evaluation. Only exposure events (fired once per user per flag per session) count toward the monthly limit.
How does LaunchDarkly experimentation add-on pricing work?
LaunchDarkly's experimentation module is a separate paid add-on, typically adding 20–40% to your base contract depending on MAU volume. SignaKit includes A/B testing and multi-armed bandit on all plans.
What about MAU charges on LaunchDarkly?
LaunchDarkly Pro includes 10,000 MAU on the base seat price. Above that, you're billed per additional MAU — roughly $0.01–$0.03/MAU/month. For a product with 100k MAU, that's an extra $1,000–$3,000/month on top of seat fees. SignaKit has no MAU pricing.
Does SignaKit support Laravel?
Yes — SignaKit has a dedicated `@signakit/flags-laravel` SDK with native support. LaunchDarkly does not offer a Laravel SDK.
Start free. No credit card required.
Free forever on the first million events. A/B testing and multi-armed bandit included on all plans.