Replay.io is a software development platform that enables engineering teams to record, replay, and debug their applications. Replay.io provides a unique approach to debugging by allowing users to jump to any point in program execution, add console logs retroactively, and collaboratively investigate software issues as a team.
How does Replay.io work?
Replay.io captures a full recording of your application's execution, making it possible to revisit any moment, analyze state changes, and insert new console logs after the fact. This approach helps developers understand complex bugs and code behavior that would otherwise be difficult to reproduce or diagnose. By enabling collaborative debugging, Replay.io streamlines issue resolution for teams working on modern web applications.
Who uses Replay.io?
Replay.io is used by a range of software companies, open-source projects, and development teams focused on improving their debugging workflows. Notable customers include:
- Glide
- Tablecheck
- Pantheon
- Next.js
- Vercel
- Replit
- Solid
- RedwoodJS
- CodeSandbox
- Typescript
- Stately.ai
- VS Code
- Stripe
- Cypress
These organizations leverage Replay.io to accelerate bug fixes and foster collaborative problem-solving within their engineering teams.
What sets Replay.io apart?
Replay.io differentiates itself by moving beyond traditional video-based debugging or log capture. Its platform allows developers to record exact program state, inspect it at any point, and add new diagnostic information after the recording is made. This minimizes the time spent reproducing bugs and makes debugging more accessible for distributed teams.
How was Replay.io started?
Replay.io was founded by engineers with deep expertise in complex software systems. CEO Brian Hackett, who holds a Stanford Ph.D. and spent a decade at Mozilla optimizing JavaScript virtual machines, developed a precursor to Replay during his tenure. Mark Erikson, known for his work as a Redux maintainer and educator, and Dominik Seifert, who has a background in high-performance systems and control/data flow analysis, round out the founding team. Their combined experience shapes Replay.io’s focus on making complex system debugging collaborative and efficient. More details can be found on their About page.
Where is Replay.io based and how big is the team?
Replay.io is headquartered in San Francisco, California, United States, and operates as a privately held company with a team of 11-50 employees.
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