Move at AI speed.
Stay in control.

The runtime control platform for releases, AI behavior, and customer experience in real time, no redeploys required.

By supplying my contact information, I authorize LaunchDarkly to contact me with personalized marketing communications about our products and services. See our Privacy Policy for more details, or Opt-Out at any time.

Where features and AI control start.

Release

Safely get features and agents to the right users.

Targeting & segmentation
Progressive rollouts
Flag lifecycle management
AI prompt, model, agent manager

Feature Flags

AI Configs

Observe

See what's happening in real time.

Performance thresholds
Error monitoring & alerting
Automated feature rollback
Stack traces & session replay

Guarded Release

Observability

Iterate

Learn and improve continuously.

Feature-based experiments
Product signals & user behavior
Statistically rigorous data analysis
Warehouse-native implementation

Experimentation

Learn more Try our demo project

Built for developers.

Seamlessly built into your workflow — not bolted onto it.

25+ native SDKs
MCP, IDE, and CLI support
80+ integrations

Backed by data.

Make better product decisions — with real-time signal.

Full-stack experimentation
Feature-level metrics
Built-in analytics

Trusted in production.

Delivering for the most demanding teams when it counts — in production.

45 trillion daily evaluations
Sub-200ms flag updates
Automated rollbacks without redeploys

Say goodbye to 2am fire drills.

84%

more frequent deployments

48%

increase in software reliability

63%

less time spent on pre-production testing and debugging

11 quadrillion

flag evaluations in production-like environments. Yes, quadrillion.

Copy,paste,go.

With a few lines of code, integrate your app and toggle on your first feature flag.

import * as LaunchDarkly from "launchdarkly-js-client-sdk"

const context = {
  kind: "user",
  key: "context-key-123abc",
  name: "anonymous"
};

const client = LaunchDarkly.initialize("<add your client-side key as an env variable>", context);

Copied!

Build like the best.

Customer stories

Read story
Paramount improves developer productivity 100X.
6-7
deployments per day
/ /
The ability to ship and merge code to environments safely without wincing every time we hit the ‘deploy’ button has been huge for us.
Read more
Read story
CCP Games creates self-serve experimentation.
Increased
player session times of happier users
/ /
LaunchDarkly has enabled self-serve experimentation. You don’t have to be a data scientist to run valid, actionable experiments. This is unbelievably powerful.
Read more
Read story
Dior shortens time to market from 15 minutes to instant updates.
< Zero
minutes to release
/ /
LaunchDarkly allowed us to progressively deliver features with confidence, creating a safety net for developers.
Read more
Read story
Bayer’s digital farming arm improves reliability for critical apps.
Improved
MTTR for mobile apps
/ /
I can change a flag status in LaunchDarkly and see it reflected in our mobile apps instantly. I’ll pay for that any day.
Read more
Read story
HP standardizes and scales releases with LaunchDarkly.
98%
decrease in deploy time
/ /
The team can switch back to a feature behavior without doing code changes.
Read more

"LaunchDarkly helped to democratize the experimentation practice and bring together data, product, and engineering teams working together around the same project."
David Tieba
Head of Product Analytics
"LaunchDarkly is super fast and reliable. I can change a flag status in LaunchDarkly and see it reflected in our mobile apps instantly. I’ll pay for that any day."
Artie Lee
Director of Engineering
"LaunchDarkly has enabled self-serve experimentation at CCP. You don’t have to be a data scientist to run valid, actionable experiments. This is unbelievably powerful."
Nick Herring
Technical Director of Infrastructure
"From 2020 to 2023, we had a massive 97% reduction in overnight and weekend releases, while enjoying a 300% increase in production deployments.”
Nathan Gray
Director of Digital Engineering Operations
"LaunchDarkly enables us to roll out features quickly, which allows us to collect user feedback early, measure system performance, and keep iterating on a feature until it yields the maximum results."
Justin Cataldo
VP of Engineering
"We use LaunchDarkly to release new features to a subset of our guests, gather responses, fine-tune our approach & validate new features in production to be able to deliver a better experience for all travelers.”
Manjari Ranganathan
IT Manager
"LaunchDarkly has given us much more flexibility than our previous tools for feature flagging and A/B testing. We’re able to experiment more effectively and make better data-driven decisions.”
Rema Morgan-Aluko
SVP Technology
“LaunchDarkly has revolutionized our development process by streamlining feature flag activation, allowing our developers to focus on more critical tasks.”
Sebastien Thibaud
Lead Developer
“LaunchDarkly unblocked a major bottleneck and allowed us to move forward with a continuous delivery process. Because of the speed that we achieved, we doubled that goal organically..”
Greg Ratner
CTO
"The ability to target experiments and analyze results efficiently has been a game-changer for us. It’s enabled us to run more tests and gain actionable insights much faster. ”
Riley Duncan
Sr. Data Analytst
"LaunchDarkly helped to democratize the experimentation practice and bring together data, product, and engineering teams working together around the same project."
David Tieba
Head of Product Analytics
"LaunchDarkly is super fast and reliable. I can change a flag status in LaunchDarkly and see it reflected in our mobile apps instantly. I’ll pay for that any day."
Artie Lee
Director of Engineering
"LaunchDarkly has enabled self-serve experimentation at CCP. You don’t have to be a data scientist to run valid, actionable experiments. This is unbelievably powerful."
Nick Herring
Technical Director of Infrastructure
"From 2020 to 2023, we had a massive 97% reduction in overnight and weekend releases, while enjoying a 300% increase in production deployments.”
Nathan Gray
Director of Digital Engineering Operations
"LaunchDarkly enables us to roll out features quickly, which allows us to collect user feedback early, measure system performance, and keep iterating on a feature until it yields the maximum results."
Justin Cataldo
VP of Engineering
"We use LaunchDarkly to release new features to a subset of our guests, gather responses, fine-tune our approach & validate new features in production to be able to deliver a better experience for all travelers.”
Manjari Ranganathan
IT Manager
"LaunchDarkly has given us much more flexibility than our previous tools for feature flagging and A/B testing. We’re able to experiment more effectively and make better data-driven decisions.”
Rema Morgan-Aluko
SVP Technology
“LaunchDarkly has revolutionized our development process by streamlining feature flag activation, allowing our developers to focus on more critical tasks.”
Sebastien Thibaud
Lead Developer
“LaunchDarkly unblocked a major bottleneck and allowed us to move forward with a continuous delivery process. Because of the speed that we achieved, we doubled that goal organically..”
Greg Ratner
CTO
"The ability to target experiments and analyze results efficiently has been a game-changer for us. It’s enabled us to run more tests and gain actionable insights much faster. ”
Riley Duncan
Sr. Data Analytst
"LaunchDarkly helped to democratize the experimentation practice and bring together data, product, and engineering teams working together around the same project."
David Tieba
Head of Product Analytics
"LaunchDarkly is super fast and reliable. I can change a flag status in LaunchDarkly and see it reflected in our mobile apps instantly. I’ll pay for that any day."
Artie Lee
Director of Engineering
"LaunchDarkly has enabled self-serve experimentation at CCP. You don’t have to be a data scientist to run valid, actionable experiments. This is unbelievably powerful."
Nick Herring
Technical Director of Infrastructure
"From 2020 to 2023, we had a massive 97% reduction in overnight and weekend releases, while enjoying a 300% increase in production deployments.”
Nathan Gray
Director of Digital Engineering Operations
"LaunchDarkly enables us to roll out features quickly, which allows us to collect user feedback early, measure system performance, and keep iterating on a feature until it yields the maximum results."
Justin Cataldo
VP of Engineering
"We use LaunchDarkly to release new features to a subset of our guests, gather responses, fine-tune our approach & validate new features in production to be able to deliver a better experience for all travelers.”
Manjari Ranganathan
IT Manager
"LaunchDarkly has given us much more flexibility than our previous tools for feature flagging and A/B testing. We’re able to experiment more effectively and make better data-driven decisions.”
Rema Morgan-Aluko
SVP Technology
“LaunchDarkly has revolutionized our development process by streamlining feature flag activation, allowing our developers to focus on more critical tasks.”
Sebastien Thibaud
Lead Developer
“LaunchDarkly unblocked a major bottleneck and allowed us to move forward with a continuous delivery process. Because of the speed that we achieved, we doubled that goal organically..”
Greg Ratner
CTO
"The ability to target experiments and analyze results efficiently has been a game-changer for us. It’s enabled us to run more tests and gain actionable insights much faster. ”
Riley Duncan
Sr. Data Analytst

Try out some flags on Toggle.

enable-toggle-thumbs-up

Try out some new poses.

swap-shoe-color

Find Toggle’s best look with A/B testing.

Okay, you get the idea.