Delivers exceptional UI generation and full-stack app creation, but focuses less on traditional multi-language code editing than Replit.
#1Replit records 10,016,437 monthly visits with -7.7% month-over-month growth and Freemium, Paid pricing. Sendmux records 37 monthly visits with -98.3% growth and Free pricing.

Give every AI agent a real inbox and one API to use it
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | replit.com | sendmux.ai |
| Pricing Model | Freemium, Paid | Free |
| Monthly Visits | 10.02M (10,016,437) | 37 (37) |
| MoM Traffic Delta |
| -833.88K (-7.7%) |
| -2.2K (-98.3%) |
| Primary Market & Share | 🇺🇸 United States (33.4%) | 🇺🇸 United States (100%) |
|---|
| Direct Visits / mo | 6.14M | 12 |
|---|
| User Rating | 4.5 | 4.2 |
|---|
| Supported Platforms | Website | Website |
|---|

Describe your idea and Replit builds a working app in minutes
Describe the product you want and the agent plans, codes, tests and iterates on a working full-stack application.
Authentication, databases, hosting and monitoring work out of the box, so apps scale without separate DevOps work.
A no-cost mode lets you brainstorm and build without spending tokens before upgrading to stronger models.
Connect services such as OpenAI, Stripe and Google Workspace in minutes rather than writing glue code.

Give every AI agent a real inbox and one API to use it
Provision mailboxes on verified domains or a shared myagent.mx address, with clean JSON output that strips signatures and quotes.
Send over HTTP or SMTP using the same mailbox credential as a Bearer token and SMTP password, with Idempotency-Key retries and attachment support.
Bind keys to providers, delivery groups, weights, and quota windows so traffic stays inside the boundaries you set.
Signed webhooks for delivery and receipt events, an SSE stream for live mailbox clients, and typed change polling for resync.
Delivers exceptional UI generation and full-stack app creation, but focuses less on traditional multi-language code editing than Replit.
#1
Provides a powerful AI-native desktop code editor for professional developers, but lacks Replit's instant browser-based cloud hosting deployment.
SpecialistProvides advanced agentic parallel coding workflows, but functions as a dedicated desktop/CLI environment rather than Replit's all-in-one cloud workspace.
#3
Converts natural language into functional web apps quickly, but provides less traditional terminal access and multi-language support than Replit.
Builds and hosts web applications conversationally, but has a less established developer ecosystem and package management suite than Replit.
SpecialistA spec-driven AI IDE and agent platform that plans, builds, reviews, and verifies real engineering work.
Generates full-stack web applications directly in the browser from prompts, but lacks Replit's robust persistent cloud workspace infrastructure.
Specializes in rapid generative UI and component creation, but offers less comprehensive full-stack server and database management than Replit.

Instantly builds and hosts full-stack apps with integrated databases, but offers less granular terminal-level control than Replit.

Collaborative inbox and email management for teams

Email an AI assistant and let it run your schedules, inbox and CRM

The universal context engine connecting agents to data, tools, and models
Delivers exceptional UI generation and full-stack app creation, but focuses less on traditional multi-language code editing than Replit.
Provides a powerful AI-native desktop code editor for professional developers, but lacks Replit's instant browser-based cloud hosting deployment.
SpecialistProvides advanced agentic parallel coding workflows, but functions as a dedicated desktop/CLI environment rather than Replit's all-in-one cloud workspace.
Converts natural language into functional web apps quickly, but provides less traditional terminal access and multi-language support than Replit.
Builds and hosts web applications conversationally, but has a less established developer ecosystem and package management suite than Replit.
SpecialistA spec-driven AI IDE and agent platform that plans, builds, reviews, and verifies real engineering work.
Generates full-stack web applications directly in the browser from prompts, but lacks Replit's robust persistent cloud workspace infrastructure.
Specializes in rapid generative UI and component creation, but offers less comprehensive full-stack server and database management than Replit.
Instantly builds and hosts full-stack apps with integrated databases, but offers less granular terminal-level control than Replit.
Collaborative inbox and email management for teams