G
GAI coding assistant and agents for editors, terminal, desktop and GitHub
Free, from $10/mo
OpenAI Codex vs Replit
Pricing, features, platforms and who each one suits — side by side.
O
Choose OpenAI Codex if…
- you want the lower entry price ($8/mo vs $18/mo)
- you need an API to build on
- you work on iOS, Slack
- you're in its core audience: software developers, engineering teams
R
Choose Replit if…
- you're in its core audience: founders, product managers
Side by side
Feature OpenAI Codex Replit
Pricing modelFreemiumFreemium
Starting price$8/mo$18/mo
Free plan
Free trial
API
Open source
Data retention—We delete or de-identify data when no longer necessary, unless law requires.
Security and complianceSOC 2 Type II, ISO 27001, GDPR, HIPAASOC 2 Type II, GDPR
Updates, last 90 days5—
Agent mode—
CLI / terminal—
Cloud agents—
AI PR review—
PlatformsWeb, iOS, API, SlackWeb
CategoryCode AssistantsApp & Website Builders
CompanyOpenAI OpCo, LLCReplit, Inc.
Based inUnited States—
Founded——
Part of——
Key features
O OpenAI Codex
- Desktop app for local coding chats
- Command-line interface (CLI)
- IDE extension
- Cloud tasks through Codex on the web
- Automatic GitHub code review
- Slack integration
- SDK for scriptable workflows
- Works with an API key and pay-per-use billing
R Replit
- AI agent builds full-stack apps from text prompts
- Built-in authentication, database, hosting and monitoring
- 100+ integrations including OpenAI, Stripe, Google Workspace
- Infinite Canvas for visual design edits
- Intelligent model routing across AI models
- Free Mode for building without token costs
- Parallel agents and team collaboration
- SSO/SAML, SCIM and audit logs on Enterprise
Plans and prices
From each vendor's site. Prices change — confirm before buying.
OpenAI Codex
Free$0/month
Go$8/month
Plus$20/month
ProFrom $100/month
Business$20/user/month billed annually; $25 billed monthly
Enterprise & EduContact sales
API KeyPay per usage
Replit
Starter$0
Core$20/mo or $18/mo billed annually
Pro$100/mo or $90/mo billed annually
EnterpriseCustom
Strengths and limitations
OpenAI Codex
- Free plan includes basic Codex use in the desktop app
- Available in the desktop app, CLI, IDE, web, iOS and SDK
- Enterprise controls such as SCIM, RBAC, EKM and data residency
- API key option for pay-per-use billing
- Free and Go plans have no published usage numbers
- Plus usage limits are given only as estimated ranges
- API key use doesn't include cloud features such as code review or Slack
Replit
- Free Starter plan with daily usage, no credit card required
- Hosting, database and authentication included
- 100+ integrations with services like Stripe and OpenAI
- Enterprise plan offers SSO, SCIM and single-tenant options
- Free plan allows only 1 live published project
- Heavier model usage is credit-based beyond included amounts
- Replit says the agent is probabilistic and may make mistakes
- Pro plan costs $100/month ($90 billed annually)
More comparisons
Other options to consider
GG
Free, from $10/mo
G
AI coding assistant and agents for editors, terminal, desktop and GitHub
Code AssistantsFree plan
C
CC
Free, from $8/mo
W
WW
Free, from $20/mo
W
AI coding IDE and command center for running local and cloud coding agents
Code AssistantsFree planAPI
D
DAutonomous AI software engineer that writes, tests and reviews code to merge-ready PRs
Free, from $20/mo
D
Free, from $20/mo
D
Autonomous AI software engineer that writes, tests and reviews code to merge-ready PRs
Code AssistantsFree plan
J
JRun and review AI coding agents across projects in JetBrains IDEs, web and CLI
Free, from $10/mo
J
Free, from $10/mo
J
Run and review AI coding agents across projects in JetBrains IDEs, web and CLI
Code AssistantsFree plan
K
KK
Free, from $20/mo
K
Spec-driven agentic coding IDE and CLI for developers and engineering teams
Code AssistantsFree plan
Built from each vendor's public website; we haven't tested them hands-on. Editorial policy