Ship features safely with
powerful feature flags
ReleaseAnchor lets you control rollouts, experiments, and kill-switches with ultra-low latency flag evaluation — without touching your deployment pipeline.
Free plan · No credit card required · Up and running in 5 minutes
The problem feature flags solve
Every fast-moving engineering team eventually hits the same wall: you can't ship fast without breaking things — unless you decouple deploy from release.
Ship code without fear
Merge to main anytime. Hide unfinished features behind a flag and enable them only when you're ready — in any environment.
Disable features instantly
When something breaks in production, flip a flag and it's gone — in milliseconds. No hotfix, no rollback, no incident escalation.
Run gradual rollouts
Roll out to 1%, 10%, 50% of users. Watch your metrics. Scale up when you're confident. Pull back if something looks wrong.
Separate deploy from release
Deploy code continuously. Release features deliberately. Decouple your deployment pipeline from your product decisions.
Integrate with your stack
Start with the REST API or the JavaScript SDK today. More native SDKs are on the way.
Everything a feature flag platform should do
Designed around the workflows that engineering teams actually use — nothing bloated, nothing missing.
Environment-based flags
Production, staging, canary — each environment has fully isolated flag state. No accidental cross-contamination.
Segment targeting
Target beta users, internal teams, or enterprise customers. Define a segment once and reuse it across any flag.
Gradual rollouts
Roll features to a precise percentage of users. Scale from 1% to 100% at your own pace — no deploys required.
Kill-switches
Toggle a flag and it takes effect in milliseconds. Stop a broken feature without a deployment or rollback.
Audit logs
Full change history — who updated which flag, when, and from what state. Stay compliant, stay accountable.
SDK-based evaluation
Lightweight, stateless evaluation via official SDKs or a single REST endpoint. No runtime dependencies to worry about.
Everything you need, nothing you don't
A clean, fast interface built for engineers — not product managers.
Integrate in seconds
One method call. One API endpoint. No complex configuration, no runtime overhead, no vendor lock-in.
// JavaScript SDK — evaluate a flag in one line
const enabled = await releaseAnchor.evaluate("new-checkout", userId);
if (enabled) {
return newCheckoutFlow(req);
}
return legacyCheckoutFlow(req);# Or use the REST API directly — no SDK needed
curl -s https://api.releaseanchor.com/v1/evaluate \
-H "X-API-Key: env_live_abc123" \
-d '{"flagKey":"new-checkout","userIdentifier":"usr_42"}'
# Response: { "value": true, "reason": "SEGMENT" }Built for production scale
Flag evaluation happens fast — because slow flags are worse than no flags.
Edge-ready evaluation engine
Evaluation runs close to your users. Designed for low-latency delivery at any scale.
Sub-50ms flag evaluation
Ultra-low latency flag resolution on every request — measured from API call to response.
Stateless SDK architecture
No persistent connections, no state to manage. Each evaluation is independent and fast.
Optimized for high-traffic applications
Built to handle millions of evaluations per month without degrading performance.
Built differently, on purpose
Most flag platforms nickel-and-dime you or cut off access the moment something goes wrong. We don't.
Grace period — we don't cut you off
If you exceed your monthly limit, your service keeps running. We give you a grace period before evaluations are restricted — time to upgrade without any sudden cutoffs.
Flat pricing — no per-seat, no overages
Pay one flat monthly rate. No per-seat fees, no surprise bills when traffic spikes. Your cost is predictable every single month.
Real-time — no cache, no delays
Toggle a flag and it takes effect on the very next request — no CDN to invalidate, no cache to flush.
One API call, zero complexity
One GET request returns all flag states for a user. No heavyweight SDK, no agent, no YAML.
Five minutes to your first flag
Create account, add flag, make API call. No infrastructure to provision, no onboarding call required.
Audit logs — included on Team and above
Full change history of every flag update, rule change, and user action. Available on Team and Enterprise — no need for an enterprise contract just to see who did what.
Infrastructure you can rely on
We build on proven infrastructure so your flag evaluations are fast, secure, and always available.
Built on AWS
Hosted on Amazon Web Services infrastructure for global reliability and proven uptime.
Edge caching with Cloudflare
Cloudflare sits in front of our API — giving you fast evaluation and DDoS protection worldwide.
High availability architecture
Designed with redundancy at every layer. No single point of failure. 99.9% uptime SLA.
Secure by design
All traffic over TLS. API keys are hashed at rest. User identifiers are never stored or logged.
Simple, transparent pricing
Start free. Upgrade when you need more. No hidden fees, no overage surprises.
For individuals and small teams getting started with feature flags.
Start for freeNo credit card required
- 1 project
- 10 feature flags
- 2 environments
- 10K flag evaluations / month
- REST API access
- Role-based access
- Percentage rollouts
- Segment targeting
- Audit logs
For growing teams that need segment targeting and advanced rollout control.
Credit card required · Cancel anytime
- 10 projects
- 100 feature flags
- 5 environments
- 1M flag evaluations / month
- REST API access
- Segment targeting
- Percentage rollouts
- Role-based access
- Audit logs
For larger teams with higher volumes and priority support needs.
Credit card required · Cancel anytime
- 50 projects
- Unlimited feature flags
- 20 environments
- 10M flag evaluations / month
- Audit logs
- Priority email support
- Team member management
For organizations that need compliance, security, and dedicated support.
Contact salesCustom quote · Talk to our team
- Unlimited projects
- Unlimited feature flags
- SSO / SAML
- Dedicated support
- Self-hosted deployment
- On-premise installation
Frequently asked questions
Do I need a credit card to get started?
No. The Free plan requires no credit card. You can create an account, set up flags, and start evaluating immediately. A card is only required when upgrading to a paid plan.
What happens when I hit my monthly evaluation limit?
You don't get cut off immediately. When you cross your limit, a grace period activates and evaluations keep running normally. You'll receive an email notification with time to upgrade before anything changes. Only after the grace period expires do evaluations start returning the default (off) value. No surprise outages at midnight because a billing threshold was crossed.
Can I upgrade, downgrade, or cancel anytime?
Yes to all three. You can change your plan at any time from billing settings — upgrades take effect immediately, downgrades at the end of the current billing period. If you cancel, you keep full access until the period ends. No cancellation fees, no locked-in contracts.
How many flags, environments, and team members does the Free plan include?
Free includes unlimited feature flags, 2 environments per project, 1 project, and up to 3 team members — enough for a real production setup. The monthly evaluation limit on Free is 50,000 evaluations. Paid plans unlock more projects, more environments, higher limits, audit logs (Team+), and additional seats.
What are the flag types and when do I use each?
There are three rule types you can stack on a single flag. Static: always on or always off — no conditions. Use this for global kill switches or completed rollouts. Segment: enabled only for users who match a named segment (beta users, internal team, paid accounts). You define the segment once and reuse it across any flag. Percentage rollout: enabled for a deterministic slice of your user base — the same user always gets the same result for a given flag. Rules are evaluated top-to-bottom and stop at the first match.
Are evaluations fault-tolerant? Will a ReleaseAnchor outage take down my production app?
No. The evaluation API is designed to fail safely. If a call times out or returns an error, the SDK returns the default value you defined in your code — typically false. Your app keeps running exactly as if the flag is off. The JavaScript SDK also caches the last known state locally, so short network interruptions don't flip anything for active users.
How fast does a flag change reach production?
On the very next evaluation call — typically milliseconds. There is no polling interval or CDN cache in front of the evaluation endpoint. The moment you toggle a flag in the dashboard, the next API call returns the new value. No configuration required.
Do environments share flag state?
Never. Each environment (development, staging, production, or any custom environment you create) has completely isolated state. Enabling a flag in staging has zero effect on production. Rules, percentages, and segments are all per-environment.
Ready to ship with confidence?
Join engineering teams that use ReleaseAnchor to release faster, reduce risk, and stay in full control of every feature — in every environment.
Start for freeFree plan · No credit card required