Replit Agent 4: create apps with AI, parallel agents and full stack infrastructure

Replit is repositioned as a platform to build apps and sites with AI: on replit.com the message is What will you build? — convert ideas into software in minutes "without knowing how to program." The protagonist is Agent 4, an agent that interprets prompts, details requirements, writes production-ready code and publishes projects with full stack infrastructure included. The first prompt is free and does not consume credits, according to the official website.

What Agent 4 brings

Replit presents Agent 4 as an evolution of collaborative vibe coding. The notable news on the home page:

• Infinite Canvas: Visual space to explore and tweak designs before applying them to code.
• Parallel Agents: Multiple agents run subtasks at once (auth, database, layout) with visibility before merging changes.
• Multiple Artifacts: web, mobile, landing, videos and slides in the same project with shared design.
• Support for Teams: Multiple members submit requests; the agent orders them and executes them in the optimal sequence.

Testimonials published on the web — from profiles on Databricks, Zillow, Gusto, Payouts.com and Talkdesk — highlight rapid prototyping, real-time collaboration and parallel execution in teams already working on the same code.

Full stack infrastructure included

Unlike a traditional IDE, Replit packages services that typically require separate configuration:

Integrated
• Authentication.
Built-in
• Database for full stack apps.
• Hosting and one-click publishing.
• Monitoring for apps in production.

The promise is to scale “from day one” without manually setting up Docker, VPS, or CI/CD pipelines for simple projects.

Integrations and use cases

Replit connects with over 100 integrations, including OpenAI, Stripe, and Google Workspace. The home suggests templates and examples: B2B project management apps, freelance portals, sales assistants with AI, websites, mobile, design, slides, animations, data visualization, 3D games, documents and spreadsheets.

Plans and prices

According to the prices page (June 2026):

• Starter (free): daily Agent credits, integrated database, slides/videos/animations, publish up to 1 project, private or password-protected deployments.
• Replit Core ($20/month, annual billing): $25 monthly credits, up to 5 collaborators, 2 agents in parallel, publishing in any region, unlimited workspaces, remove “Made with Replit” badge, Replit AI integrations.
• Replit Pro (95 USD/month annually, 100 USD monthly): 100 USD credits, 15 collaborators, 50 viewers, 10 parallel agents, more powerful models, DB rollbacks up to 28 days.
• Enterprise (custom price): SSO/SAML, advanced privacy controls, design system, single-tenant environments, static IPs, VPC peering — see Enterprise.

Security and business

For large teams, Replit mentions SOC 2, SSO/SAML, management controls, and screening services. The integration with Lakebase and Databricks Apps (cited by CEO Ali Ghodsi in the home) aims to combine generation with AI and governed enterprise data.

Replit vs Cursor, Lovable and others

Replit competes in the same space as vibe coding tools and development agents (Cursor, Lovable, Bolt, etc.), but focuses on native hosting and databases rather than just being a local editor. Agent 4 reinforces multi-user coordination and parallel tasks — useful when multiple profiles (PM, design, ops) contribute requests to the same repo.

In summary

What is Replit? Cloud platform to create and publish software with AI. What is Agent 4? Agent that plans, codes and deploys with parallel agents and visual canvas. How much does it cost? Free to start; Core at 20 USD/month annually. Where to try? replit.com.