Greta
Also known as: Greta.sh, Greta by Questera, Greta AI app builder
Greta is an AI app builder from Questera AI that turns a description into a website or full stack web app with its own database, auth and payments, then deploys it with SSL and a custom domain. An agent plans and builds across files, Self growing Websites research and publish SEO content on a schedule after approval, and Flows wire in Slack and AI steps. Pro is $50 a month at list price, offered at $20 under a welcome discount.
Greta is a product of Questera AI, part of Quest Labs INC, a Delaware corporation founded by Shubham Nigam and backed by Afore Capital and Techstars, whose main business is a separate agentic customer engagement platform. Greta launched in 2025 as a web builder for websites and full stack web apps, and its name stands for Growth Engineering Tech Agent. The company also runs a sister agency that builds products for clients and sells separate Mac apps that are not part of the builder.
A builder describes an app and Greta's agent plans, edits across files and runs quality checks, with a plan mode that proposes steps without changing the project and a deeper Ultrathink mode on Business. Apps get a built in database, backend APIs, authentication with Google sign in, Stripe payments on the customer's own keys and email through Resend or SMTP, or a beta link to the customer's own Supabase.
A per project Knowledge tab holds coding standards, API references and brand guidelines, and chats accept documents, spreadsheets and images. Self growing Websites research watched Reddit, YouTube and web sources and Search Console data, propose articles and fixes, and publish on a schedule once approved, while Flows add workflows with Slack and AI steps, and beta Agents can check Slack and run scheduled tasks. Code can be read on every plan, edited from Starter, downloaded as a zip and pushed to or pulled from GitHub by hand.
Apps deploy on Greta's own hosting with SSL and a CDN, on its subdomains or a custom domain bought through Greta or connected, and a private pilot sends static frontends to the customer's Netlify. A model picker covers Claude, Gemini, Grok, Kimi, GLM, MiniMax, Qwen and DeepSeek models, with bring your own key through OpenRouter for $5 a month outside Enterprise. Projects have Owner, Editor and Viewer roles, Greta says it does not train on outputs, single sign on sits on Enterprise, and Greta itself names no security certification. An MCP server with 39 tools lets coding agents in an editor build on Greta, though its page is unlinked and behind a feature flag.
Free gives 5 credits a day, Starter lists at $20 a month for 100 credits and Pro at $50 for 250, shown at $5 and $20 under welcome offers, Business costs $200 a month for 1,000 credits, and Enterprise is custom, with yearly billing and credit top ups. It fits founders and marketers who want a hosted app or a site that keeps publishing content without managing infrastructure. It fits less well for teams that need automated testing, runtime logs, certified security or a backend they host themselves.
Vendor details
Canonical URL
https://www.greta.sh
Category
Coding agent
Subcategory
AI app builder that builds and hosts websites and full stack web apps with a built in backend, plus scheduled SEO agents for self growing sites
Funding status
Questera, through Quest Labs INC, is backed by Afore Capital and Techstars; no amounts are stated on Greta's pages.
Company status
first party product
Use cases & customers
Primary use cases
Target customers
Deployment options
Integrations
GitHub push and pull by hand; Stripe with the customer's own keys; a beta link to the customer's Supabase; email through Resend or SMTP; Slack and OpenAI, Claude and Gemini steps in Flows; Netlify publishing; GA4 by measurement ID; Namecheap domains with DNS helpers; an MCP client for outside servers; and a Greta MCP server for coding agents.
In practice
A founder describes a membership app; Greta plans it, builds the pages with its built in database, Google sign in and Stripe payments on her own keys, and deploys it with SSL to a domain she buys inside Greta.
A marketer turns on a Self growing Website for a consulting firm; Greta watches chosen Reddit threads, YouTube channels and Search Console data, proposes articles and fixes, and publishes them on schedule only after she approves.
A developer on Pro pushes a project to a GitHub repository, edits a component locally, pulls the change back into Greta, and connects the Greta MCP server so a coding agent in his editor can make further changes.
Sources & related URLs
Related / legacy domains
Research sources
Agentic Index coverage score
10.0 / 14 capabilities · 71%
| Integrations & Tool Calling | Full |
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Greta pushes and pulls code with GitHub by hand, connects Stripe with the customer's secret key to set up payment plans, links the customer's own Supabase organization in beta, sends email through Resend or the customer's SMTP, and registers domains through Namecheap. Flows call Slack and OpenAI, Claude or Gemini steps on the customer's own keys, apps publish to Netlify, GA4 connects by measurement ID, and outside MCP servers can be added with an API key and switched on or off. Sourcegreta.sh/connectorsread 2026-11-08 |
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| Workflow Orchestration | Full |
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Agent Mode makes multistep changes across files from one prompt, plans before building and runs quality checks, while plan mode proposes a step by step plan without changing the project and Ultrathink on Business plans more deeply. Agents in beta work in the background, checking Slack and running scheduled tasks, with up to three on paid plans, and Flows chain triggers and up to five integrations in a visual workflow builder. Sourceapp.greta.sh/learninghub/agent-mode-complex-tasksread 2026-11-08 |
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| Knowledge Grounding & RAG | Full |
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A per project Knowledge tab stores coding standards, API references and brand guidelines that Greta applies to every change, and the agent reads the whole project structure. Chats take images, video, PDFs, documents, spreadsheets, slides, JSON and zip files up to 50 MB by plan, an asset manager holds up to 500 MB, and Self growing Websites research watched Reddit threads, YouTube channels, websites and Search Console data before proposing content. Sourceapp.greta.sh/learninghub/project-settingsread 2026-11-08 |
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| Human Oversight & Guardrails | Full |
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Plan mode and a discussion mode let a builder settle the approach before any change, nothing from a Self growing Website goes live until it is approved and its schedule needs an Approve schedule step, and MCP actions such as saving a theme wait for a yes. The code editor keeps a history with Revert to this version, rollback also runs through GitHub, and a single active contributor model with Owner, Editor and Viewer roles keeps edits orderly. Sourcegreta.sh/self-growing-websitesread 2026-11-08 |
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| Security, Identity & Governance | Partial |
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Projects have Owner, Editor and Viewer roles, with only owners able to connect GitHub or Supabase and editors unable to see Supabase credentials, which are encrypted on the server, and the MCP server signs in with OAuth and PKCE. Greta says it does not train on outputs, and single sign on appears only as an Enterprise line on the pricing page. Greta names no certification of its own, and the SOC 2 Type II badge on Questera's site gives no date or scope. Sourcegreta.sh/privacy-policyread 2026-11-08 |
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| Observability & Auditability | Partial |
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Web Analytics on Starter tracks visitors to deployed apps, GA4 plugs in by measurement ID, and a database viewer shows user activity and helps debug backend workflows. Credit history, Flow run counts and growth reports over 7, 15 or 30 days round out the views, but there are no runtime or error logs for built apps and no record of the agent's actions beyond the chat. Sourceapp.greta.sh/learninghub/gretas-built-in-databaseread 2026-11-08 |
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| Memory & State Persistence | Partial |
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Self growing settings keep a description of the business, a writing voice and topics to avoid across every scheduled run, and the Knowledge tab carries standing guidance into each session. Both are configuration and instructions rather than memory the agent builds, and Greta describes nothing it learns from past sessions, corrections or a builder's preferences that carries forward or can be reviewed and cleared. Sourceapp.greta.sh/learninghub/self-growing-websitesread 2026-11-08 |
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| Deployment & Data Residency | Partial |
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Greta hosts apps itself with SSL and a global CDN on its own subdomains or a custom domain, managing hosting entirely on its side, and a private pilot deploys static frontends to the customer's own Netlify team. The beta Supabase link can put an app's data in the customer's own Supabase, and code can be downloaded as a zip, but no region choice, private cloud or self hosted edition exists. Sourcegreta.sh/docs/netlifyread 2026-11-08 |
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| Prebuilt Agents / Templates / Packs | Full |
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More than 100 templates, spec pages with starter prompts and a marketplace where creators buy, sell and rate app templates and UI components give builders ready starting points. Design systems range from three on Free to more than 20 on Starter, with custom and AI created systems on Pro, alongside project themes and Flow templates for common workflows. Sourcegreta.shread 2026-11-08 |
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| Triggers & Channel Coverage | Full |
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Work starts from chat or voice prompts, from outside coding agents through the Greta MCP server, and on schedules: Self growing Websites run daily, twice a month or on a custom schedule in the local time zone, beta Agents run scheduled tasks and react to Slack, and a nightly toggle can apply search readability fixes. Flows start from user actions such as button clicks, and no public API starts the builder. Sourcegreta.sh/self-growing-websitesread 2026-11-08 |
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| Model Flexibility & Routing | Full |
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A model picker offers a multi provider default or a choice among Claude Haiku 4.5, Claude 4.5, Gemini 3 Pro and Flash, Grok Code Fast, Kimi K2, GLM 4.7, MiniMax M2.1, Qwen 3 Coder and DeepSeek v3.1. Builders can bring their own key through OpenRouter, free on Enterprise and a $5 monthly add on otherwise, and AI steps in Flows run on the customer's own OpenAI, Claude or Gemini keys. Sourcedocs.questera.ai/greta/openrouter-byok-in-greta.mdread 2026-11-08 |
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| APIs / SDKs / MCP Extensibility | Partial |
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A Greta MCP server over streamable HTTP with OAuth and PKCE offers 39 tools so coding agents in an editor can build, theme and deploy projects on Greta, metered in credits, but its page is unlinked from the site, the endpoint sits behind a feature flag and no full tool list is public. There is no public REST API, SDK or command line tool for driving the builder from another program. Sourceapp.greta.sh/mcpread 2026-11-08 |
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| Testing, Debugging & Optimization | Partial |
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The agent runs quality checks as it builds, a Fix with Greta button sends errors back for repair, and Self growing fixes are checked again on the live site and closed once they pass. An AI feature scanner appears in plan data without explanation, and Greta's terms leave reviewing, validating and testing apps to the customer, with no automated tests described. Sourceapp.greta.sh/learninghub/agent-mode-complex-tasksread 2026-11-08 |
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| Browser / Computer-use | Not documented |
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Nothing in Greta's builder drives a browser or desktop, and builders check their apps by clicking through the live preview themselves. Audra, a separate Mac app from the same company, runs checks in a local Chrome, but it is sold on its own and sits outside this product, and no Greta agent clicks through a built app, fills its forms or visits outside sites. Sourcegreta.sh/llms.txtread 2026-11-08 |
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The Agentic Index coverage score grades every vendor Full, Partial or Not documented against the same 14 buyer facing capabilities, from public evidence only. Each capability links to how all vendors in the index score on it. How this evidence is graded
Pricing
Free with 5 credits a day, or Starter at $20 a month list for 100 credits, shown at $5 a month under a 75 percent welcome offer.
Monthly or yearly plans sized by credits, with credit volumes up to 10,000 a month on Pro and Business, top ups and paid add ons.
Included quota
Starter includes 100 credits a month, Pro 250 and Business 1,000, with Pro and Business selectable up to 10,000 credits a month.
What is public
Free, Starter, Pro and Business list and offer prices, yearly prices, credit volumes and top up prices, with Enterprise by contact.
Billing mechanics
Credit plans billed monthly or yearly under welcome offers, with selectable credit volumes, top ups and add ons.
Cost watchouts
Welcome offers cut the first period well below list price, bring your own key adds $5 a month outside Enterprise, and domains bought through Greta are priced at checkout.
Variable cost rationale
Plans are credit allowances, so heavy building, scheduled self growing runs and support calls draw credits faster and push builders to larger volumes or top ups, while welcome offers make the first period cheaper than the list price.
Additional watchouts
Offer prices differ from list prices, and credit rules differ between the pricing page and the docs.
Overage / add-ons
Top ups add credits from 250 for $50 to 5,000 for $1,000 without a plan, bring your own key through OpenRouter costs $5 a month outside Enterprise, and developer support calls cost 45 credits per 30 minutes.
Sales call required
Mixed (some tiers require a call)
Free / trial
The Free plan gives 5 credits a day that reset at midnight UTC, with no card required; there is no trial of paid plans.
Lowest paid plan
Starter at $20 a month list for 100 credits, shown at $5 under a welcome offer
Commercial notes
Questera AI sells Greta directly through Quest Labs INC, beside a sister agency that builds apps for clients.
Key ambiguities
The pricing page gives 5 free credits a day while Questera's docs give 50 one time, and plan features such as GitHub, database and team management sit on different tiers in the pricing page and the app's plan data.
Cancellation / refund
Monthly or yearly self serve plans; Enterprise by contract.
Support SLA / resale
Pro adds GitHub sync, the Knowledge tab and custom design systems, Business adds more credits and Ultrathink, and Enterprise adds a dedicated account manager, single sign on, SLA guarantees, onboarding and free bring your own key.
Missing data
How long welcome offers last, Enterprise pricing and which credit rollover terms apply.
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