A note on method before the list: this is a documented comparison — compiled from each vendor's public pricing page, official docs, and user reviews as of early July 2026 — not hands-on lab testing. We build one of these tools, so read our entry with the same skepticism you'd read any vendor's. Prices change often; the vendors' own pages are the source of truth.
For each tool: what it is, what it costs to start, how usage is metered, the biggest complaint that actually shows up in reviews and forums, and who it fits.
1. opix
What it is: opix turns a description into a running full-stack app — real Next.js code on a dedicated Postgres database per app, with a live preview, publishing, custom domains, and GitHub export.
Price and usage: Starter is $29/month for 120 credits; Pro is $59/month for 300 credits (adds custom domains and GitHub export); Business is $129/month for 750. A live cost meter shows what every message costs before you send it, failed builds and auto-fixes are free, and one-time credit packs never expire. Free accounts get 5 welcome credits (plus a small verification bonus) — enough for a first real build.
The honest trade-off: opix is the newest product on this list. There's no large body of independent third-party reviews yet, the community and template pool are smaller than Lovable's or Replit's, and the $29 paid entry is above the $25 of Lovable and Bolt and the $20 of Replit. What it offers instead is the pricing mechanics the rest of this list gets criticized for: visible costs, free failures, and credits that don't evaporate.
Fits best: builders who want to own the output — exportable code, their own database — and who care about knowing what a build costs before running it.
2. Lovable
What it is: the biggest community in the category — a prompt-to-app builder with an integrated backend (Lovable Cloud) and GitHub sync.
Price and usage: Pro is $25/month for about 100 monthly credits; the free tier grants 5 build credits a day, capped at 30 a month, plus 20 Cloud credits. Message costs vary by complexity (official docs give examples from 0.5 to 2 credits), and unused plan credits roll over while the subscription stays active — check Lovable's docs for the current rollover terms. Backend usage is metered separately in Cloud credits.
Biggest documented complaint: credit drain on error-fix loops, compounded by the dual-layer billing. A 2026 thread on r/lovable describes it looping "on fixing the same error forever" while burning credits, and multiple 2026 pricing guides (Totalum, eesel.ai) flag the build-credits-plus-Cloud-credits split as the top source of bills exceeding expectations. We compare the models in detail on our Lovable alternative page.
Fits best: people who want the largest ecosystem, templates and community answers, and accept variable per-message costs.
3. Bolt.new
What it is: StackBlitz's builder that runs a full-stack environment directly in your browser via WebContainers; it also builds mobile apps with Expo.
Price and usage: Pro is $25/month starting at 10 million AI tokens; free accounts get 1M tokens a month with a 300K daily cap. Paid tokens roll over one extra month. Teams is $30 per member/month.
Biggest documented complaint: token consumption. Reports collected in 2026 include a single prompt consuming 2.5M tokens (a quarter of a monthly Pro allowance), and the review aggregator yeasitech counts 140+ user reports of token waste on error loops, describing a wall where apps stall short of production-readiness. Tokens bill the model's detours by construction. More on our Bolt alternative page.
Fits best: developers who value the instant in-browser runtime and Expo mobile output, and who can prompt precisely enough to keep token burn down.
4. v0 by Vercel
What it is: Vercel's generator, strongest at React/shadcn/Tailwind UI, with GitHub sync and one-click Vercel deploys on every plan including free.
Price and usage: the free tier includes $5 of monthly usage credits capped at 7 messages a day. The $20 Premium plan is discontinued for new users, making the effective paid entry Team at $30 per user/month (with $30 of included credits plus small daily grants). Credits are a prepaid dollar balance burned at model-dependent token rates; unused credits roll over and expire after 65 days.
Biggest documented complaint: credit burn while iterating UI — one widely-shared 2026 review of v0 alternatives reports users burning 10-15 credits refining a single component — plus the paid-entry jump after Premium's discontinuation. Details on our v0 alternative page.
Fits best: teams already on Vercel who mainly need excellent front-end generation inside that ecosystem.
5. Replit
What it is: the most complete platform on the list — a full cloud IDE plus autonomous agent (Agent 4 since March 2026), hosting, built-in Postgres, and native mobile output. Code is fully editable and exportable; it's a real development environment.
Price and usage: Core is $20/month ($18/month billed annually) with $20 of monthly Agent credits; Pro is $100/month with $100 in credits and up to 10 parallel agents. The free Starter tier has daily agent credits and allows 1 published app. Billing is "effort-based": simple checkpoints typically cost under $0.25, complex tasks cost more, and there is no published cap per checkpoint. Unused monthly credits don't roll over.
Biggest documented complaint: unpredictable effort-based costs. Users on Replit's own forum report inconsistent charge rates and bills multiplying after agent loops; a much-quoted 2026 Reddit thread puts it as "10% tokens for building, 90% tokens to fix errors." The review site emergent.sh cites a Trustpilot score of 3.1/5 across nearly 1,500 reviews as of June 2026, with billing surprises the recurring theme.
Fits best: technical users who want an agent inside a real IDE they can drop into, and enterprises (SSO, VPC options) — with a budget for variable costs.
6. Base44
What it is: a Wix-owned no-code vibe-coding platform: describe an app, get frontend, backend, database, auth and payments hosted entirely on Base44's infrastructure.
Price and usage: Starter is $20/month ($16/month billed annually) with 100 message credits plus 2,000 integration credits; the free tier has 25 message credits a month (max 5/day) and up to 5 apps. Two credit types meter both building and runtime usage (emails, LLM calls, automations). Credits don't roll over, and official docs state credits are non-refundable for AI mistakes.
Biggest documented complaint: the ownership story. GitHub sync (Builder plan and up) exports the app code, but the exported app requires Base44's hosted backend to run — the database, auth and integrations aren't exportable or self-hostable, and reviewers on Product Hunt describe this as real lock-in despite the "you own everything" marketing. Reddit threads also document platform changes breaking live production apps.
Fits best: genuinely non-technical builders who want everything (auth, database, email) handled in one place and accept living on the platform.
7. Anything (formerly Create.xyz)
What it is: Create.xyz relaunched as "Anything" (anything.com) in August 2025 — an agent that builds web apps and native mobile apps (Expo, with App Store submission built in), with a managed backend and a Postgres database per project.
Price and usage: Pro is $19/month billed annually ($228 upfront) or $24 month-to-month, with 20k credits; Max is $199/month annual with 220k credits, scaling in tiers to $899/month. Notably, official docs state a paid plan is required to build at all — the free tier only keeps existing apps live. Monthly credits expire with no rollover; separate top-off packs never expire.
Biggest documented complaint: credit burn — the official docs carry a "Why are my credits going so fast?" troubleshooting entry — alongside a rebrand that reviewers on Trustpilot say left some projects difficult to edit. Code export is zip-only; GitHub sync was still listed as "coming soon" in July 2026. In nocode.mba's 2026 head-to-head test it struggled with multi-feature apps (broken filtering, misrouted detail pages).
Fits best: solo operators and creators shipping small web and mobile apps fast, who are comfortable paying from day one.
8. Firebase Studio
What it was: Google's browser-based agentic environment (the App Prototyping agent plus a cloud VS Code IDE), free during its preview.
Why it's on the list with an asterisk: Google announced its sunset on March 19, 2026; new signups and workspaces have been disabled since June 22, 2026, and the platform shuts down entirely — with permanent data deletion — on March 22, 2027. As of mid-2026 a new user cannot join at all. Google directs users to Google AI Studio and Antigravity instead. It stays on this list only because people still search for it; it is not a viable choice for new projects, and its one-year lifespan is a fair reminder that platform risk is real even with the biggest vendors.
The comparison at a glance
| Tool | Paid entry | Usage model | Free tier | Code export |
|---|---|---|---|---|
| opix | $29/mo (120 credits) | Credits, live cost meter, failed builds free, packs never expire | 5 welcome credits | GitHub export + eject (Pro) |
| Lovable | $25/mo (~100 credits) | Credits, variable per message, rollover while subscribed | 5/day, max 30/mo | GitHub sync |
| Bolt.new | $25/mo (10M tokens) | Raw tokens, 1-month rollover | 1M tokens/mo (300K/day) | Download/export |
| v0 | $30/user/mo (Team) | Dollar credits, model-dependent burn, 65-day expiry | $5 credits/mo, 7 msgs/day | GitHub sync (all plans) |
| Replit | $20/mo ($18 annual) | Effort-based checkpoints, no published cap | Daily credits, 1 published app | Zip + GitHub |
| Base44 | $20/mo ($16 annual) | Message + integration credits, no rollover | 25 msg credits/mo (5/day) | GitHub sync (Builder+); backend stays hosted |
| Anything | $19/mo annual ($24 monthly) | Credits, monthly expiry; packs never expire | No free building | Zip only |
| Firebase Studio | — (sunsetting) | — | Closed to new signups | Zip (for migration) |
The free AI app builder question
If you specifically want to build for $0, here's the honest state of the free tiers:
- Bolt.new has the most generous raw allowance — 1M tokens a month — though a confused generation can eat a day's 300K cap quickly.
- Lovable gives 5 build credits a day (30/month), enough for slow, steady experimentation.
- Replit's Starter has free daily agent credits but publishes only 1 app.
- v0's free tier ($5 of credits, 7 messages/day) suits UI components more than full apps.
- Base44 offers 25 message credits a month with a 5-a-day cap — one reviewer on Product Hunt reported hitting the ceiling on day two.
- Anything has no free building at all: a paid plan is required to generate.
- opix gives 5 welcome credits plus a verification bonus. That's smaller than Bolt's or Lovable's allowance, and we'd rather say so than spin it. What it buys is a complete real build — and because failed builds are free and the cost meter is visible from message one, the free run teaches you exactly what the paid experience costs. No free tier on this list sustains a real product; the point of a free tier is to learn the tool's mechanics before paying.
How to choose
Sticker prices cluster within a few dollars. The durable differences are mechanical, and three questions expose them: Who pays when a generation fails? (Tokens and per-attempt credits bill the detours; opix eats them.) Does unused money expire? (Check rollover fine print everywhere.) Can you leave with your app? (Code export is table stakes; a database and backend you can take is the real test.)
We keep sourced, page-by-page breakdowns on /compare, and the shortest honest advice stands: run the same real prompt on two or three free tiers and read the meters yourself.
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