# Trusted by Engineering Leaders

[Site index](https://speedscale.com/llms.txt)

## Pages

- [Cimpress reduces dependency risk for upgrades](https://speedscale.com/customers/cimpress/index.md): Learn how Cimpress uses Speedscale and proxymock to replay production traffic locally, catch regressions before CI, and reduce the risk of dependency upgrades.
- [ContainIQ finds defects faster with traffic-based service mocks](https://speedscale.com/customers/containiq/index.md): See how ContainIQ finds defects faster with traffic-based service mocks and ships with confidence using Speedscale.
- [Cosmetics Retailer cuts troubleshooting time by 2 weeks with Speedscale](https://speedscale.com/customers/cosmetics-retailer/index.md): See how a leading cosmetics retailer cut troubleshooting time by 2 weeks by testing with real traffic in Speedscale.
- [Digibee maximizes development velocity with Speedscale](https://speedscale.com/customers/digibee/index.md): See how Digibee maximizes development velocity with Speedscale's traffic replay, service mocking, and API observability solutions.
- [GooseOps prevents silent outages and cuts cloud costs with Speedscale](https://speedscale.com/customers/gooseops/index.md): See how GooseOps used Speedscale to right-size Kubernetes resources during a Docker Swarm migration, preventing silent outages and cutting cloud costs.
- [IHG Hotels & Resorts selects Speedscale as their 'one-stop-shop' for test environments and data](https://speedscale.com/customers/ihg/index.md): See how IHG Hotels & Resorts selected Speedscale as their one-stop-shop for test environments and data, improving their API testing and development workflows.
- [Trusted by Engineering Leaders](https://speedscale.com/customers/index.md): See how leading companies like IHG, Cimpress, Nylas, and Underdog use Speedscale to improve API testing, performance, and reliability.
- [National Restaurant Chain Gains Confidence in App Performance During Peak Hour Traffic](https://speedscale.com/customers/national-restaurant-chain/index.md): See how a national restaurant chain gained confidence in app performance during peak hour traffic with Speedscale's load testing platform.
- [Navitaire's Journey to Better Performance and Scale with Speedscale](https://speedscale.com/customers/navitaire/index.md): See how Navitaire drives productivity and cost savings by simulating production environments with Speedscale's traffic-based approach.
- [Nylas improves account synchronization performance 30x with Speedscale](https://speedscale.com/customers/nylas/index.md): See how Nylas improved account synchronization performance 30x by testing with real traffic in Speedscale.
- [From Football Kickoff to the Super Bowl: How Underdog Ensures Performance at Scale with Speedscale](https://speedscale.com/customers/underdog/index.md): See how Underdog Fantasy achieved 99.99% uptime with Speedscale's traffic replay, ensuring peak performance from football kickoff to the Super Bowl.