Replit Agent is the AI agent inside Replit, the browser-based platform where it plans, builds, tests and publishes apps from plain-language prompts. Agent 4 launched on March 11, 2026, and one project can now hold several outputs that share a backend, including web apps, mobile apps, slides, animations, data visualizations, documents, spreadsheets and 3D games, and designs can be explored first on the Design Canvas. Replit says more than 50 million people use the platform and that users from 85% of the Fortune 500 build with it. Named enterprise customers include Atlassian, LabCorp, PayPal, Zillow, Talkdesk, Adobe and UKG. Replit raised $400 million at a $9 billion valuation in March 2026 from investors including Georgian, G Squared, Prysm Capital, YC, Coatue, a16z and Qatar Investment Authority, and opened its first international office in London in September 2026.
Agent works in three modes. Free Mode covers everyday work at no extra cost within the plan allowance, which resets every five hours on Core and Pro with weekly limits. Power is a paid mid-tier mode and Max uses top frontier models, and on Core and Pro, Auto routing picks a model for paid work. Replit asks for confirmation before any paid action starts. Plan mode lets Agent draft an ordered task list for review before it changes code, and a task board runs background tasks in parallel, one at a time on Core and up to 10 on Pro. Every app gets built-in services with no setup, including a managed PostgreSQL database with separate development and production databases, App Storage, Replit Auth and custom domains. Published apps run on Replit hosting with DDoS protection and a web application firewall, and Replit also offers iOS, Android and desktop apps.
Security runs through the build and publish flow. Security Agent, available to all paid builders, maps the routes and data flows of an app, builds a threat model and combines model-based review with Semgrep and HoundDog.ai static analysis, and Replit says this hybrid scanning reduces false positives by 90%. Package Firewall blocks malicious packages at install time and is on by default, automatic dependency scans flag newly disclosed CVEs, and Auto-Protect monitors published apps around the clock and prepares Agent patches. A Level 3 black-box pen test can also exercise the running app, and publishing can be set to block critical vulnerabilities.
Connectors give Agent signed-in read and write access to more than 70 services, including Google Workspace apps, Gmail, Outlook, SharePoint, GitHub, GitLab, Bitbucket, Linear, Jira, Asana, Confluence, Notion, Slack, Salesforce, HubSpot, Zendesk, Intercom, Stripe, Shopify, Snowflake, BigQuery and Databricks. Most connectors need Core or above, and Pro and Enterprise can add custom connectors. Agent is also an MCP client, with a curated list of MCP servers such as Stripe, Linear, Notion, Sentry and Atlassian plus any custom HTTPS server, and Replit runs its own MCP server, so ChatGPT, Claude, Slack and other MCP clients can create, find, update and publish Replit Apps.
Pricing was read on replit.com/pricing in October 2026, in USD, and the page defaults to yearly billing. Starter is free, with daily Agent credits up to a monthly cap, Lite build and one published app that goes down after 30 days. Core is $20 per month, or $18 per month billed annually, with $20 toward more powerful models, Plan mode, connectors, unlimited published apps, up to 5 builders and one background task. Pro is $100 per month, or $90 per month billed annually, at its entry credit tier, with credits that roll over for two months, up to 15 builders, 50 viewers, 10 parallel tasks, a 28-day database recovery window and priority support, and larger Pro credit tiers run up to $2,000 per month billed annually. Enterprise is custom and adds SSO with SAML and SCIM, role-based access, audit logging to a SIEM, an Enterprise Security Center, unlimited seats and data warehouse connectors. Paid Agent work is billed per checkpoint by request effort, and credits also cover publishing, storage and databases.
Apps published on Starter, Core and Pro are hosted by Replit, and self-hosting a Replit-built app or running Replit in your own cloud is limited to Enterprise preview and early access. Developers who want an editor or terminal on their own machine and their own git workflow can compare Cursor (from $8/mo) or Claude Code (from $17/mo billed annually). Builders who want another browser-based app builder can compare Lovable and Bolt.new, and teams focused on native mobile apps can compare CatDoes.
Current state Q4 2026: Free Mode launched on August 18, 2026, intelligent model routing followed on August 26, and black-box pen tests arrived in August. Replit announced on September 25 that it had acquired Atta, a business-analysis and charting company, and on October 16 it introduced Bring Your Own Cloud for Azure, Google Cloud and AWS, with Full BYOC in private preview and BYOC for Published Apps and Image Exports in early access for Enterprise customers. Replit says it is on track for $1 billion in run-rate revenue by the end of 2026.
