Lovable vs Bolt vs Replit vs Cursor: Which Survives Production?
None of the four is production-ready by default. Replit guards live data best, Cursor's code is most portable, Lovable and Bolt fail on Supabase access rules.
None of the four ships a production-ready app by default, but they fail in different places. In October 2026, Replit has the strongest built-in protection for live data (its agent can’t modify the production database), Cursor produces the most portable code because it lives in your own repo on infrastructure you choose, and Lovable and Bolt get you to a working app fastest on a Supabase-based backend, which is exactly where the best-documented leaks in AI-built apps come from. Whichever you pick, the access rules, secrets, backups and payment handling are still your job.
Key takeaways
- Lovable and Bolt fail on data access. Both generate apps that read Supabase-style databases straight from the browser. When Row Level Security is off or wrong, the public key reads everything. That pattern is behind CVE-2025-48757 and is the main finding of Escape’s scan of 5,600 vibe-coded apps.
- Replit learned the hard way and fixed the worst of it. After its agent deleted a production database in July 2025, Replit separated development and production databases.
- Lovable went the other way on environments. Since October 5, 2026, every Lovable Cloud project runs on one database: the data you see while building is the data your live app uses.
- Cursor gives you the most control and the fewest guardrails. Your code is in Git and runs where you deploy it. Your agent also has your shell and whatever tokens are lying around, which is how one startup lost its production database in about nine seconds.
- Built-in scanners help, and every vendor says they’re not enough. Lovable’s docs say its scans cannot guarantee complete security. Bolt’s audit checks only your database.
What each tool actually is
These four get compared as if they were the same product. They aren’t, and the differences decide what breaks.
Lovable and Bolt are app builders. You describe the app in a chat, and the tool writes the frontend, provisions a backend, and hosts the result. Lovable Cloud is a managed backend that uses Supabase’s open-source foundation. Bolt Cloud runs on Netlify for hosting and Supabase for data, and new Bolt projects use Bolt’s own database by default.
Replit is a cloud workspace with an agent. Code, database, secrets and deployments all live on Replit, and the agent works inside that workspace.
Cursor is a code editor with an agent. It doesn’t host anything. Your code lives in a folder on your machine and in whatever Git remote you push to, and you choose the database, hosting and auth provider yourself. Since SpaceX completed its acquisition of Cursor in August 2026, it’s sold as part of a bundle with Grok and X Premium.
So when people ask which one “survives production,” they’re really asking two questions. Does the code survive (can you keep running it, change it and move it)? And does the data survive (who can read it, and can you get it back)?
Side by side
All details below are from vendor docs and pricing pages as of October 2026. Prices change often; check the linked pages before you buy.
| Lovable | Bolt | Replit | Cursor | |
|---|---|---|---|---|
| Where the code lives | Lovable, with two-way sync to a GitHub repo you own (private by default) | Bolt, with GitHub sync that commits automatically and pulls every 30 seconds | Replit workspace, with one-click GitHub sync from the Git pane | Your machine and your Git remote |
| Backend and database | Lovable Cloud (Supabase-based) or your own Supabase project | Bolt Database by default, or Supabase on Pro and Teams | Replit Postgres; new databases run on Replit’s Helium infrastructure since Dec 4, 2025 | Whatever you choose |
| Hosting | Lovable | Bolt Cloud (Netlify) | Replit deployments | Whatever you choose |
| Auth | Lovable Cloud auth (Supabase-based) | Bolt Cloud auth | Replit Auth, where your users sign in with Replit accounts, or Clerk | Whatever you build |
| Secrets | Lovable Secrets; it flags API keys pasted into chat | Not covered in Bolt’s Cloud overview | Encrypted Secrets, with separate production secrets | Your .env files and your host’s settings |
| Agent and live data | One database for building and the live app since Oct 5, 2026 | We found no documented dev/prod split | Agent can’t modify the production database | Anything your shell and tokens can reach |
| Backups and rollback | Restore in the Database area; export up to 15 GB | Version History doesn’t restore databases | Checkpoint rollback; up to 28 days of database rollback on Pro | Whatever your database provider gives you |
| Built-in security checks | Quick scan on every publish, plus an on-demand Deep scan | Database Security Audit, same checks as Supabase’s Security Advisor | Security Agent, dependency scans, optional publish blocking | Sandboxed terminal by default; code review is up to you |
| Pricing model | Pro from $25/month for 100 credits, Business from $50; Cloud usage metered in credits | Pro $25/month from 10M tokens; Teams $30 per member | Core from $18/month and Pro from $90/month, billed annually; agent work billed per checkpoint by effort; hosting and production database usage-billed | Plus $8, Premium $30, Super $100, Ultra $200 a month; third-party models at API list price; hosting extra |
| What typically breaks | Missing or wrong RLS, keys in the bundle, schema changes hitting live data | Missing or wrong RLS, keys in the bundle, no database undo | Usage bills, auth tied to Replit accounts, migrations at publish | Whatever you didn’t review: secrets, destructive commands, untested code |
Lovable: fastest to a real app, and the most documented leaks
Lovable is very good at what it’s sold for. A non-engineer can get a working app with signups, a database and a custom domain without touching infrastructure. The GitHub sync puts the code in a repo you own, which matters more than most founders realize until they need to hire.
The failures arrive with real users, and they’re mostly about data access. Lovable apps typically talk to the database from the browser using a public key, which is safe only when Row Level Security is on and correct. In CVE-2025-48757, a researcher found 170 of 1,645 showcased Lovable apps with tables that could be read or written without logging in. In February 2026, The Register described a Lovable-built exam platform that exposed 18,697 user records through an inverted auth check.
There was also a platform-level incident. Lovable’s own write-up says that between February 3 and April 20, 2026, a backend regression re-enabled access to the chat history and source code of public projects, and bug reports filed from February 22 were closed without escalation. Private projects and Lovable Cloud weren’t affected. If you ever pasted a key into a public project’s chat, rotate it.
What Lovable has fixed. It reverted the regression and made historically public projects private. Its security tooling is now real: a Quick scan runs automatically on publish and flags tables without row-level access control, and a Deep scan reviews application code for unauthenticated endpoints, leaked secrets and payment issues (Lovable docs). Note that the Security center is listed as a Business plan feature.
What changed for the worse. Lovable Cloud retired its Test and Live environment split on October 5, 2026. Drafts preview code changes, but there’s no second database. That means a prompt that changes your schema or “cleans up” rows is working on your customers’ data. Moving to your own Supabase project, where you can control environments, has no one-click path.
Add yourself before launch: RLS policies tested as a logged-out user and as a second user; secrets moved out of code and rotated; a backup and export routine you’ve actually restored from; and a rule that schema changes happen on a copy first.
Bolt: similar strengths, similar risks, fewer documented incidents
Bolt sits close to Lovable. It builds full-stack apps in the browser, hosts them on Bolt Cloud, and now provisions a database for you. Its GitHub integration is solid: Bolt commits every working change and pulls outside edits back in, and it can import an existing repo, which Lovable can’t.
We didn’t find a Bolt platform breach comparable to Lovable’s or Base44’s. Bolt apps still show up in the same public scans, because they share the same architecture: a browser client, a public key and database policies doing all the access control. Escape’s scan of 5,600 vibe-coded apps included Bolt apps alongside Lovable and Base44.
What Bolt does well. Bolt turns on RLS for tables it creates, and its Security Audit runs the same checks as Supabase’s Security Advisor, including a warning for policies that always return true.
Where it’s thin. The audit checks only the database, not your code. It flags public tables even when you meant them to be public, so founders learn to ignore it. And Bolt’s Version History doesn’t restore databases: rolling the project back leaves your data as it is. We couldn’t find documentation of a separate production database for published Bolt apps, so plan as if there’s one database.
Add yourself before launch: everything on the Lovable list, plus a backup you control, because the undo button doesn’t cover data. If you take payments, verify Stripe webhook signatures server-side; our production-readiness checklist covers the details.
Replit: the most guardrails, after the most famous failure
Replit’s July 2025 incident is the one everyone remembers. During an explicit code freeze, its agent wiped records for more than 1,200 executives and over 1,190 companies, then said a rollback wouldn’t work. It would have.
To be fair to Replit, its response is the most complete of the four. Every published app now has a development database and a production database, and the agent can’t modify production. Schema changes reach production only when you publish. There’s checkpoint rollback, and Pro includes database rollback up to 28 days. In August 2026 Replit added an automatic Semgrep scan of the files the agent changes, on top of a Security Agent and an option to block publishing when critical vulnerabilities are found.
What breaks instead. Three things:
- Lock-in through auth. With Replit Auth, your users sign in with Replit accounts on a Replit-branded page. That’s fine for an internal tool. For a consumer product, plan the move to Clerk early; Replit documents a migration, but it’s easier with 50 users than with 5,000.
- Migrations at publish. Structural changes made in development get applied to production when you publish, and publishing can briefly stop the app. A column rename that looked harmless in development can break the live app or drop data.
- Bills that track usage. Agent work is billed per checkpoint by effort, and production hosting and databases are usage-billed. Set spending alerts before launch.
Also note that secrets are encrypted, but collaborators can see their values. Remove contractors when they’re done.
Add yourself before launch: server-side authorization checks on every route (Replit’s own docs say AI-generated code still needs security review around auth, queries and secrets), a tested migration process, separate production secrets, and spending alerts.
Cursor: the code survives, if you supervise the agent
Cursor is a different kind of tool, and for a founder who can’t read code it isn’t really an alternative to the other three. For a founder with an engineer, or one who’s learning, it produces the most durable result: ordinary code in your own repo, deployed to standard infrastructure that any engineer can work on. There’s no platform to migrate off.
The trade is that nothing is managed for you. Cursor won’t set up RLS, back up your database or keep keys out of your bundle. It does whatever you and the agent decide, with your credentials.
That’s where the documented failures are. In April 2026, a Cursor agent running Claude Opus 4.6 hit a credential mismatch during a staging task and deleted a Railway volume holding PocketOS’s production database, along with its volume-level backups. It used a token it found in a file unrelated to the task, originally created only to manage custom domains. Railway, which keeps its own disaster backups, restored the data about 30 minutes after hearing from the founder. Most teams won’t have that safety net.
The editor itself has had vulnerabilities too. In August 2025 researchers disclosed CurXecute and MCPoison (CVE-2025-54135 and CVE-2025-54136), which allowed code execution through prompt injection and tampered MCP configs. Both were fixed in Cursor 1.3.x.
What Cursor has fixed. Since version 3.6, the default run mode is Auto-review: allowlisted commands run, others run in a sandbox that restricts file and network access, and the rest go to a classifier. The “Run Everything” mode has no sandbox and no classifier. If you turned it on to stop the prompts, turn it off. And don’t rely on .cursorignore to hide secrets: Cursor’s docs say the agent’s terminal and MCP tools can’t be blocked by it.
Pricing is in flux. On October 12, 2026, Cursor moved to the X Subscription tiers: Plus at $8, Premium at $30, Super at $100 and Ultra at $200 a month. The new plans include Grok models, and third-party models, such as Anthropic’s or OpenAI’s, are billed at API list price on top. If your team relies on non-Grok models, budget for usage billing.
Add yourself before launch: no production credentials on developer machines, scoped tokens with no delete rights, backups stored outside the provider you’d delete them from, code review on every agent change, and the full production-readiness checklist, because Cursor does none of it for you.
So which one survives production?
Here’s how we’d decide, based on who’s building and what’s at stake.
| Your situation | Best fit | What you must add |
|---|---|---|
| Non-technical founder validating an idea, no sensitive data | Lovable or Bolt | GitHub sync on from day one; RLS checked before the first real signup |
| Non-technical founder with paying users | Replit, or Lovable/Bolt plus an engineer reviewing every release | Tested access rules, backups you’ve restored, a staging copy of the database |
| Internal tool for your own team | Replit | Auth decisions, spending alerts |
| Founder with an engineer, or a team | Cursor | Review on every change, scoped credentials, CI with tests |
| Regulated data (health, kids, finance) | Cursor with a real engineering process | Everything above, plus a security review before launch |
A common path that works: prototype in Lovable or Bolt, keep the GitHub sync on, and once you have paying users, move day-to-day development into Cursor or a similar editor with an engineer reviewing changes. Because Lovable and Bolt both write to a repo you own, that move doesn’t require a rewrite. Whether you need one is a separate question, and usually the answer is no. We explain when a rebuild is justified, and what each path costs, in how much it costs to fix a vibe-coded app.
Two things don’t change with the tool. First, the scanners are a floor. Every vendor says so in its own docs, and Veracode found 45% of AI-generated code introduced a security flaw in its tests, most of which looked like working code. Second, check your backups. If you’re on your own Supabase project on the free plan, there are no automatic daily backups to restore from.
If you’d like us to check yours
Whichever of the four you built on, the questions are the same: who can read which rows, where your secrets are, what the agent can touch, and whether you could restore yesterday’s data. Our AI-App Rescue Audit answers them on your actual code and database. It’s $1,490 fixed and delivered in 72 hours, and you get a severity-ranked report plus a refactor-or-rebuild verdict with a fixed quote. If we find fewer than five material issues, you get a full refund. If you then book a Stabilization Sprint (from $7,500 for two weeks) within 30 days, the audit fee is credited in full.
Want to work through it yourself first? Start with the production-readiness checklist. Or book a call and tell us which tool you used and what’s worrying you.