Thu, May 15, 2025Replit: The Safest Place for Vibe Coding
We’re beefing up security. We’re launching the world’s best vibe coding history feature. And for those of you bringing Replit to work, we’re improving our Enterprise readiness. Vibe coding makes software creation accessible to everyone, entirely through natural language. Whether it’s personal software for yourself and family, a new business coming to life, or internal tools at your workplace, Replit is the best place for anybody to build. AI coding is powerful but can be nerve wracking if you're building something for the first time. Is my user information safe? Is my API key exposed? Will my app be vulnerable to attackers? Maybe you didn't even know you had to consider these things to begin with! These challenges can lead users to stumble into vibe coding tragedies. They put too much burden on users to utilize external services, track their own history, or validate the security of their code. We hate hearing stories of users on other platforms who lost months of work, accidentally exposed secret API keys, or even exposed user data.
Thu, May 8, 2025Introducing Replit Auth: add secure login to your app
User login, social sign-in, and user management — all from a single prompt with Replit Auth We’ve heard from users that user login can be one of the hardest features to add. There are many places you can get stuck: configuring external services, managing callbacks, integrating new login providers, and storing user information. Even if you get through all of that, you might be left wondering: is my app actually secure? That’s why today we’re excited to announce Replit Auth. With just a simple modification to your prompt, adding “use Replit Auth”, you’ll get:
Tue, Apr 22, 2025Secure Vibe Coding: The Tools and Fundamentals to Vibe Code Securely
Nothing is more exciting than realizing your vision. Nothing is worse than realizing you had a major security flaw. The good news? While security is crucial, it doesn't have to be an obstacle, especially when you're building on Replit. We integrate many security features directly into the platform, and our AI tools can handle much of the heavy lifting, letting you focus on building. This post is your practical guide to navigating security essentials. We'll walk through the key fundamentals to secure vibe coding, provide a security checklis, and give 16 practical tips for how you can vibe code more secure apps (and how to do so simply). Replit's five fundamentals for secure vibe coding Up to 40% of AI suggestions may contain vulnerabilities. At Replit, we've taken a unique approach: making security automatic and integrated for the most secure vibe coding possible.
Tue, Apr 15, 2025How Zinus Saves $140,000+ and Cuts Development Time by 50% with Replit
The Zinus team turned a costly, time-consuming process into an efficient, automated system by developing internally with Replit. Company: Zinus, Inc. Industry: E-commerce, Home Goods Team: Mason Kim (Global DevOps Engineer) and Joshua Cortez (Software Engineer) Stack: Replit for frontend, custom backend API Impact: $40,000 annual recurring savings on license fees + $112,050 one-time development cost savings, with 50% reduction in development time
Wed, Mar 26, 2025Secure Vibe Coding Made Simple
As vibe coding revolutionizes app development, security can't be an afterthought—it needs to be a core part of the creation process. Recent Stanford research shows that developers using AI assistants wrote less secure code in 80% of tasks compared to those coding manually, while being 3.5 times more likely to overestimate their code's security. And that's professional developers, we've seen an even more concerning trend among vibe coded apps. At Replit, we don't just take this seriously, we build security into every app you create with Agent, by default—something Replit CEO Amjad Masad has called "the Pit of Success". That's why our apps are secure, by default. We bake security in to the process of building with Agent—so you can focus on creating.
Wed, Mar 26, 2025What is Vibe Coding?
From idea to app, fast—that's always been our mission at Replit. But what if you could turn your ideas into working apps without knowing how to code at all? Enter vibe coding: a term that's democratizing app creation for everyone, regardless of technical background. What is vibe coding? Vibe coding refers to the practice of instructing AI agents to write code based on natural language prompts. It's not about being lazy—it's about focusing your time and energy on the creative aspects of app development rather than getting stuck in technical details.
Thu, Mar 13, 2025Agent Just Got Eyes — Click. Describe. Done.
Making changes to your app should be as fast as possible. Instead of manually describing what to edit, what if you could just click? Now you can. Meet Element Selector, a simple yet powerful way to select any UI element in your app and modify it instantly with Agent or Assistant. No need to type out descriptions or search through files — just Click. Describe. Done. How It Works Toggle the Element Selector — You can find it alongside the chat input tools in Agent and Assistant. Click to select — Want to edit a button? Change a heading? Just click it. Describe changes — Assistant updates text, colors, or styles in seconds. Use Agent to add features like turning a static list into a searchable one.
Sat, Mar 8, 2025Everything you need to know about MCP
You can find the 3-min quickstart from the video here What is MCP? MCP (Model Context Protocol) is a standard way to connect AI models to data sources and tools. It allows AI to access information and capabilities beyond what they were originally trained on. MCP works like a universal connector for AI systems. Just as standard ports let different devices work together, MCP lets different AI models connect to the same tools and data sources. This means developers can build a tool once and have it work with any AI model that supports MCP. It's like the USB-C port of AI applications.
Wed, Mar 5, 2025Using Tvix Store to Reduce Nix Storage Costs by 90%
For the past few years, Replit has been using Nix to serve packages/dependencies and provide consistent development environments to our users. Nix on Replit allows users to have access to a large number of packages and libraries that can be seamlessly integrated into a user's project. Motivation In order to quickly serve thousands of packages to our users, we attach a large Nix store persistent disk to all development containers serving Replit apps. While this approach has worked well for a while, this persistent disk grows with every subsequent NixOS release (eventually reaching a size of 20Tb). When considering ways to reduce the size of this disk, one important constraint was to never remove store paths from the cache. Project that depend on packages in older Nix channel releases could still link to these store paths, so in order to maintain backwards compatibility those store paths must remain. Tvix Store Tvix is a new modular implementation of Nix that contains a series of components that can be used individually. One of these components is the Tvix store. tvix-store is a Nix store implementation backed by the tvix-castore. The tvix-castore manages blobs (file contents) and directory info (file metadata, like names, permissions, etc). tvix-store manages nix path info metadata, effectively creating a mapping of Nix store paths to tvix-castore contents.
Thu, Feb 27, 2025Introducing Workflows
With Workflows, you can easily save your development processes and organize them as a sequence of Tasks. Instead of having to repetitively type commands into your shell and remember them, Workflows provide an intuitive interface to configure your frequently used commands and execute them with the click of a button. Simplifying development with Workflows Workflows give you the ability to better organize your project execution pipeline, while offering an accessible interface to reuse them. Using the Workflows pane, you can easily configure specific buttons to run specific commands, and even link multiple Workflows together in a chain. Instead of copy pasting "cd ./client && npm run dev && cd ../server && node server.js", you can define the procedure as a Workflow with multiple Tasks. Let's see how it works with an example.
Wed, Feb 26, 2025Replit's All-new Database Editor
This week, we launched a new Database Editor feature on Replit. This feature is another addition to Replit’s full suite of tools that make it easy for anyone to build an app — no coding knowledge required. When you build an app on Replit, you get a fully-functioning project that’s ready to send out to the world. This includes real databases powered by Postgres: the most popular database in the world, that powers many of the applications you use every day. Did you know? Postgres is used by half of all professional software developers, according to StackOverflow’s developer survey. Replit handles all the setup and management of your databases, so it’s never been easier to get started. Now, we’re making it even easier to use databases on Replit. Inside your app’s workspace, head to the “database” pane, and click to the “My Data” tab. Here, you’ll see a spreadsheet-like view of your app’s data.
Tue, Feb 25, 2025Introducing Replit Agent v2 in Early Access
Smarter with realtime app design preview In partnership with Anthropic’s Claude 3.7 Sonnet launch, we're excited to announce the release of Replit Agent v2 in our early access program. The early access program is available exclusively to users on Replit paid plans who have opted in to Explorer Mode (for instructions on opting in to Explorer Mode, see below). While we're encouraged by initial results, you may encounter speed bumps and areas needing improvement as we continue development. What's new: A more autonomous Agent
Tue, Feb 4, 2025Replit launches the first software creation Agent on iOS and Android
You've always wondered why that app didn't exist. Now you can — Make an App for That. We’re thrilled to announce that everyone can now try Replit Agent for free! Check out what we’re launching: Replit launches the first software creation agent on iOS and Android — use our AI app builder to build and deploy apps from your iPhone or Android. Chat with Agent as if texting a friend, and watch as it writes, deploys, and hosts your app in real time — no laptop required. Free Tier for Everyone: Replit Agent is now accessible to everyone with a free tier that includes trying Agent, making it easier than ever to start building apps!
Thu, Jan 30, 2025Repls are now Replit Apps
Today we made a big update to how we name things on Replit. What we previously called “Repls” are now “Replit Apps”, or just “Apps” for short. It’s a better description of what users are building on Replit today, and more in line with how we name things. REPLs are something we’ve always been a fan of at Replit. The read-eval-print-loop is one of the fastest and most intuitive ways to understand programming, try ideas, and get feedback. Those are all values we try to instill in the product to this day. The name Repl on Replit goes way back, even further than the company itself. When Amjad first launched a project to make coding in the browser easier, it was called JSREPL because it gave you a JavaScript REPL right in the browser. No installing tools, just write code.
Thu, Jan 16, 2025AI Coding is Better with Python
"Can everyone really code with AI?" I hear this question all the time. Usually after someone sees a viral post about an AI-built app and thinks "I could do that too!" But here's what those posts don't tell you: most AI-generated apps are just pretty shells—nice looking websites that lack functionality. Why? Most AI coding assistants build with JavaScript and are optimized for presenting information to the user (frontend development). These apps lack the backends and services that power functional applications. JavaScript is great. It creates beautiful frontends—Replit’s AI tools use it well. But Replit is unique: we don’t only use JavaScript. In fact, there are many times it’s not the right tool for the job. Perhaps you’re: