Gelt.dev
Fixa is a cloud coding agent that turns plain-language prompts into deployed full-stack web apps — and runs the code before you ship it.
Fixa earns its place when you need a working app with a URL, not a screenshot. The cloud sandbox that runs and self-checks the code, plus codebase download on every paid tier, is what separates it from generators that hand you a snippet. The free tier on GPT-6 Luna is enough to test the workflow before you commit, and the paid roster is unusually broad — Claude Fable 5.1, Opus 5.5, Sonnet 5.5, Haiku 5.5, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra and Grok 4.7. If you want deterministic framework control or a data-intensive backend, Lovable or a hand-built stack will serve you better.
Verified 20h ago · liveness 70/100 · cite: rightaichoice.com/tools/gelt-dev
- Non-technical founders who need a live MVP that can take payments
- Product managers validating ideas with real users before committing engineering time
- Freelancers and agencies wanting a deployable base they can download and extend
- Small businesses building internal tools with Stripe checkout wired in
- Developers who need to dictate folder structure, framework and dependency choices upfront
- Teams with data-intensive backends or complex pipeline requirements
- Organizations with strict compliance rules over where code runs
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Skip Fixa if you need to specify the framework, folder layout and dependencies yourself before the first line is written, or if your code must stay on your own infrastructure during the build.
Beyond the $0/mo Free tier, Starter, Pro, Max and Ultra are usage-priced — your bill scales with agent messages, so a heavy build week costs more than a quiet one.
Free at $0/mo costs nothing to test. Starter through Ultra are usage-priced with a rising ceiling rather than a flat seat fee, which suits a solo builder or a two-person agency better than a 20-person team that needs predictable per-head billing. If you want a flat monthly seat, compare against the published plans at Lovable, Bolt and Replit before committing a whole team to usage billing.
In short
Gelt.dev — Fixa is a cloud coding agent that turns plain-language prompts into deployed full-stack web apps — and runs the code before you ship it. Best for Non-technical founders who need a live MVP that can take payments, Product managers validating ideas with real users before committing engineering time, Freelancers and agencies wanting a deployable base they can download and extend. Free to use.
What's new in Gelt.dev
Checked todayAcross the latest 1 update: 1 feature update.
What people actually say about Gelt.dev — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
24 mentions across 3 sources (Hacker News, YouTube, Product Hunt) · researched Jul 27, 2026.
Average across the 3 sources that answered — each source counts once, not each post.
- +Natural language to full-stack app in minutes – no coding needed.
- +Pay-per-message billing – only pay for what you generate.
- +One-click deploy to Vercel with built-in Stripe integration.
- +Multi-model AI support (Claude, GPT-5, Gemini) gives flexibility.
- +100% in-browser workflow – no setup, no terminal.
- −Very limited real user feedback – mostly just launch buzz.
- −Support depends on a single teenage founder – risky for uptime.
- −Stripe and Vercel integrations only – no external API support.
- −Not suitable for complex or data-heavy applications.
- −No offline development – must be always online.
- • Pay-per-message model can add up quickly with large projects
Viability Score
How well maintained and how widely used is Gelt.dev? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- Turn plain-language app descriptions into deployed full-stack web apps
- Cloud sandbox runs your code and self-checks output before you ship
- Start from scratch or import an existing GitHub repository
- Iterate by chatting with the agent in natural language
- Command palette for triggering agent actions quickly
- Connect MCP tools to extend the agent's capabilities
- One-click deploy to production
- Stripe payment integration configured through chat
- Download the full codebase for self-hosting or local development
- Usage-based billing with tiered usage ceilings
- Free tier runs on GPT-6 Luna
- Premium models across tiers: Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, Claude Haiku 5.5, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra, Grok 4.7
- Priority sandboxes for faster agent runs on paid plans
- Ad-free agent experience on paid plans
- Custom domains, team management and real-time collaboration on Enterprise
About Gelt.dev
Fixa (formerly Gelt.dev) is an AI software engineer that works inside its own computer in the cloud rather than a chat window. Describe the app you want in plain language, or import an existing GitHub repository, and the agent works through the code, runs it, and checks its own output before anything reaches production. The result is a real codebase you can download and self-host, not a throwaway demo. You steer the work by chatting with the agent or firing commands from a command palette, and you can wire up Stripe payments without leaving the conversation. Deployment is one click once the agent clears its own output. The free tier runs on GPT-6 Luna. Paid tiers — Starter, Pro, Max and Ultra — unlock the full model roster: Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, Claude Haiku 5.5, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra and Grok 4.7 — plus higher usage limits, priority sandboxes, an ad-free agent experience and codebase download. Enterprise adds custom domains, team management, a shared team design system and real-time collaboration. It fits non-technical founders, product managers, freelancers, agencies and small teams who have an app idea and don't want to spend weeks on infrastructure — especially an MVP that has to take payments on day one. Against v0, Lovable, Bolt and Replit (Fixa publishes its own comparison pages for each), the pitch is a workspace that executes and self-checks code rather than only generating it.
Behind the Verdict
Fixa's core bet is that generation without execution is a demo, not a deliverable. The agent sits in an isolated cloud sandbox, writes the app, runs it, and checks its own output before you deploy. That loop is the difference between a snippet you paste into a local repo and something that already has a URL. Paid tiers let you pull the whole codebase down, so the escape hatch is real — you are not locked into the platform if the app outgrows it. The model story is unusually flexible for this category. Free sits on GPT-6 Luna only. Starter and above open eight models across three vendors: Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, Claude Haiku 5.5, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra and Grok 4.7. In practice that means you can put a cheaper model on scaffolding chores and a stronger one on the payment flow — and you can switch when one model handles your stack better. The workflow is deliberately narrow: chat or command palette, MCP tools for extension, Stripe wired through the conversation, one-click deploy. That narrowness is the product. There is no folder-structure editor, no dependency manifest to hand-tune, no infrastructure console. Architects who want to dictate framework and layout upfront will find it friction, and teams with heavy data pipelines or strict code-residency rules should look elsewhere. The honest caveat is billing. Beyond the $0/mo Free tier, Fixa prices Starter, Pro, Max and Ultra by usage, with the subscribed tier setting your usage ceiling rather than a flat seat fee — so cost tracks how hard you lean on the agent. Compare that to the flat monthly seats most of its competitors quote before you budget a team rollout.
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Real-world workflow fit
Concrete scenarios for the personas Gelt.dev actually fits — and what changes day-one when you adopt it.
You describe a paid newsletter site with Stripe checkout, let the agent build and run it in the sandbox, then deploy once it self-checks clean.
Outcome: A live URL taking payments the same day, plus a downloadable codebase to hand to a contract developer later.
You import a client's GitHub repository, ask the agent to add a Stripe donation form, and iterate in chat while previewing each run.
Outcome: A working change delivered against the existing repo instead of a rebuilt prototype, with the codebase downloadable for handover.
You build a clickable internal dashboard on the free tier with GPT-6 Luna, then upgrade to Starter when you need a premium model and codebase download for the engineering handoff.
Outcome: Cheap validation first, and a real artifact to show stakeholders when the idea clears.
Use Cases
- Build a marketing landing page with Stripe payment integration in minutes.
- Create a simple SaaS dashboard for internal team use.
- Prototype a mobile-first booking app for a local service business.
- Generate a full-stack todo app with user authentication and database.
- Deploy a portfolio site with a built-in contact form and Stripe donations.
- Import an existing GitHub repo and iterate on it with the agent.
- Stand up an MVP that accepts payments before a demo or launch date.
- Let a non-technical founder ship a first version without hiring an engineer.
Models Under the Hood
as of 2026-10-18
Limitations
- The free tier gives only a small monthly allowance and access to GPT-6 Luna, with community support.
- Higher usage limits, priority sandboxes, the ad-free experience, codebase download and the premium model roster (Claude Fable 5.1, Opus 5.5, Sonnet 5.5, Haiku 5.5, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra, Grok 4.7) sit behind paid plans starting from $9 a month.
- Everything runs in an isolated cloud sandbox rather than on your machine, so you don't control where the code executes during the build.
- Custom domains, team management and real-time collaboration are Enterprise-only.
as of 2026-10-17
Verification history
We have re-verified Gelt.dev 9 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Showing the 6 most recent of 9 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Gelt.dev tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Free
$0/mo
Ideal for
Anyone testing whether a prompt-to-deployed-app workflow fits before spending anything, or a hobbyist shipping a one-off page.
What this tier adds
Free entry point at $0/mo: limited agent access, chat on web, GPT-6 Luna only, community support.
Starter
Usage-based
Ideal for
A solo founder or freelancer building a real MVP who needs a premium model and the ability to download the code.
What this tier adds
Adds higher usage limits than Free, an ad-free agent, priority sandboxes, the full premium model roster and codebase download.
Pro
Usage-based
Ideal for
A builder running longer sessions who keeps hitting the Starter usage ceiling mid-project.
What this tier adds
Raises the usage ceiling above Starter while keeping the same premium models and codebase download.
Max
Usage-based
Ideal for
A heavy individual user or a small agency running several client builds in parallel.
What this tier adds
Higher usage limits than Pro on top of the same model roster and priority sandboxes.
Ultra
Usage-based
Ideal for
The single heaviest individual user — someone for whom the agent is the primary development environment.
What this tier adds
The highest individual usage limits Fixa offers, above Max, with the same premium model access.
Enterprise
Custom
Ideal for
A team or organization that needs a branded URL, shared design conventions and multiple people working in the same project.
What this tier adds
Moves beyond usage tiers to custom domains, team management, enterprise integrations, a shared team design system and real-time collaboration.
Where the pricing makes sense
The company stage and team size where Gelt.dev's pricing actually pencils out — and where peers do it cheaper.
Free at $0/mo costs nothing to test. Starter through Ultra are usage-priced with a rising ceiling rather than a flat seat fee, which suits a solo builder or a two-person agency better than a 20-person team that needs predictable per-head billing. If you want a flat monthly seat, compare against the published plans at Lovable, Bolt and Replit before committing a whole team to usage billing.
Setup time & first value
How long it actually takes to get something useful out of Gelt.dev — broken out by persona, not the marketing-page minute.
Free tier: sign up and start prompting in minutes, since there's nothing to install — the agent has its own cloud computer. Paid: add checkout and Stripe wiring, then expect a short session to get to a first deployed app. Enterprise with custom domains and team management takes longer, since it starts with a sales conversation.
Switching to or from Gelt.dev
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From a chat-only code generator: paste or import the repo into Fixa, then let the sandbox run it so you find out immediately whether the code actually executes.
- →From a hand-built stack: import the GitHub repository and ask the agent to add features incrementally rather than rewriting from scratch.
- →From a throwaway prototype tool: rebuild the app in Fixa on the free tier with GPT-6 Luna, then upgrade to Starter for codebase download.
- ↗To a local dev setup: download the codebase on any paid tier and continue in your own editor and pipeline.
- ↗To a contract developer: hand over the downloaded repository as the starting point instead of a specification document.
- ↗To a more controlled platform: export the code and re-deploy on infrastructure you manage yourself.
Integrations
Resources & Guides
Tutorials & Learning
YouTube returned 6 videos for “Gelt.dev”, and we withheld 6: 6 did not mention Gelt.dev. We are showing none, because we could not prove any of them are about Gelt.dev.
Official links
Tools that pair well with Gelt.dev
Common stack mates teams adopt alongside Gelt.dev, with the specific reason each pairing earns its keep.
Lovable
Lovable is an AI app builder that turns plain-language prompts into deployed full-stack web apps with hosting, auth and payments.
Verdent
Verdent turns plain-language prompts into full-stack products with parallel AI coding agents.
Replit Agent
Replit Agent turns a plain-English prompt into a running full-stack app inside your browser, then publishes it to a live Replit URL.
Featured Head-to-Head Comparisons
Gelt Dev vs Spider Cloud
Choose Spider Cloud if you need a high-performance, cost-efficient web scraping API for AI agents and RAG pipelines, with recent additions like Browser AI commands. Choose Gelt.dev if you want to build a full-stack web app from a natural language description without coding. They solve different problems—Spider Cloud gets you data, Gelt.dev gets you a deployable app.
Gelt Dev vs Voyage Ai
Voyage AI and Gelt.dev serve entirely different needs. Choose Voyage AI if you are an enterprise building a high-accuracy RAG pipeline that requires domain-specific embeddings, long-context support, and rerankers — especially for finance or legal. Choose Gelt.dev if you are a non-technical founder or product manager who wants to instantly turn a natural language description into a deployable web app with Stripe integration and no coding.
Gelt Dev vs Temporal Ai
Temporal is for teams building production-grade AI agents and workflows that need durability, retries, and observability. Gelt.dev is for non-technical users who want to quickly generate and deploy web apps from a description. Choose Temporal if you need reliability at scale; choose Gelt.dev if your priority is speed of prototyping with minimal code.
Alternatives to Gelt.dev
View allLovable
Lovable is an AI app builder that turns plain-language prompts into deployed full-stack web apps with hosting, auth and payments.
Verdent
Verdent turns plain-language prompts into full-stack products with parallel AI coding agents.
Replit Agent
Replit Agent turns a plain-English prompt into a running full-stack app inside your browser, then publishes it to a live Replit URL.
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