Breadcrumb: Home / Blog / 6 Best AI App Builders for Agencies
By Isha, Greta.sh Team · Published August 18, 2026 [VERIFY: link this byline to a real author/about page if one exists.]
6 Best AI App Builders for Agencies: Top Tools in 2026
The best application builder for an agency depends on what you're actually optimizing for and no single tool wins on all three things agencies typically need: fast client portals, clean handoff/ownership when the engagement ends, and permissions that keep multiple clients' data separate. Retool and Softr are built specifically around client-facing portals with real permission systems. Bubble has the largest ecosystem of agencies already building on it, but its no-code-export policy is a real handoff limitation. Lovable and Greta both generate genuinely ownable code, with different tradeoffs on team collaboration and cost. Base44 is fastest for early-stage client pitches, not full delivery. Full comparison below.
Who this is for
If you run a dev, design, or no-code agency and need to stand up client-facing portals, internal tools, or MVPs for multiple clients - each with its own branding, data, and access, this comparison is ranked on what actually matters for that: portability of the finished product, per-client permission boundaries, and pricing that scales with client count rather than just your own team's seats.
How we evaluated these for agency use specifically
Agencies have different needs than a single founder building one product: they need to stand up client portals quickly, keep each client's data and branding separate, and hand off something the client can actually own and maintain afterward. We ranked each platform on handoff/ownership, client-portal and permission depth, and how pricing scales across multiple client projects - not just raw build speed. This is based on public pricing pages and documentation. Current as of August 2026.
Best AI app builders for agencies, ranked
1. Retool — the strongest choice for client portals and multi-client permissions
Retool has a dedicated concept for exactly this use case - Portals, built for external users outside your organization plus a permission and governance layer mature enough that agencies serving regulated or enterprise clients can rely on it:
- External-user pricing separate from your team's builder seats: on the Business plan, external/portal users are priced in tiers that drop as volume grows: 0–50 free, 51–250 at $8/mo each, 251–500 at $6/mo each, over 500 at $4/mo each. This scales far better across many client portals than a flat per-seat model.
- Audit logging, SSO/SAML, and ISO 27001 / SOC 2 Type II compliance built in - useful if any client has vendor-security requirements.
- An AI-powered builder plus MCP integration, so you can build with Claude Code, Cursor, or ChatGPT and deploy inside Retool's governed environment, or import a client prototype built on Lovable or Replit and bring it under proper governance before handoff.
Pricing: Free (unlimited apps, 500 workflow runs/mo, up to 5 users, no external-user support), Team ($12/mo per builder + $7/mo per internal user), Business ($65/mo per builder + $18/mo per internal user, external users priced separately as above), Enterprise (custom).
Sources: greta.sh/alternative/retool
2. Softr — the fastest way to spin up a branded client portal
Softr is built specifically around client portals, and it shows in the pricing structure itself:
- Unlimited apps and unlimited collaborators even on the free plan - useful for an agency team working across many small client builds.
- Granular, per-user-group permissions for keeping each client's view of their portal scoped to just their own data.
- Custom domains from the free tier, so a client-facing portal can live on the client's own domain immediately.
- The catch: removing Softr's own branding requires the $139/mo Professional plan - for an agency pitching under its own brand, that's the real minimum tier, not the advertised free or $49 entry point.
- SSO and SOC 2 compliance are Enterprise-only, alongside a dedicated success manager — relevant if a client's procurement team asks.
Pricing: Free ($0, 10 app users, Softr branding visible), Basic ($25/mo, 10 AI credits), Pro ($119/mo, 50 AI credits, branding removal, custom code), Business ($395/mo, 100 AI credits, Filtered user sync, 2FA, Installable mobile app).
3. Bubble — the largest agency ecosystem, with a real handoff tradeoff
More development agencies already build client work on Bubble than on almost any other no-code platform — there's a substantial ecosystem of Bubble-focused dev shops, and the feature depth explains why:
- A visual workflow/logic editor with AI-assisted workflow blocks for client-specific business logic.
- Granular privacy rules for per-client data separation.
- A large plugin marketplace for bolting on integrations a specific client needs without custom code.
- Real-time multi-user collaborative editing, useful for an agency team building the same client project together.
Here's the tradeoff that matters more for agencies than for solo founders: confirmed directly from Bubble's own documentation, Bubble retains ownership of the underlying code, and there's no way to export a Bubble app's functional logic as code at any price — only data (CSV/API) can be exported. If your engagement model includes handing the client something they can take to another developer or host themselves, Bubble can't do that; the client's app stays dependent on Bubble indefinitely.
Pricing: Free (~50,000 workload units/month, single editor), Starter (~$69/mo), Growth (~$249/mo), Team (~$649/mo), Enterprise (custom).
Sources: greta.sh/alternative/bubble
4. Lovable — real code handoff, and pricing built for growing teams
Lovable is a strong middle ground between Bubble's ecosystem depth and Greta's all-in-one generation, with two features that matter specifically for agencies:
- Unlimited collaborators on every plan, including free — an agency team isn't penalized for adding more people to a project the way per-seat pricing on other platforms can.
- GitHub sync, so the finished app's code lives in a real repository a client (or their next developer) can actually take over - a genuine handoff path that Bubble doesn't offer.
- A dedicated Internal Tools template category and dashboard use case, useful if a client's project is an admin panel or reporting dashboard rather than a customer-facing app.
The tradeoffs: pricing is credit-based per action, which makes total cost across several concurrent client projects harder to predict than a flat tier; and per Lovable's own plan comparison, SSO sits behind the Business plan and audit logs/SCIM behind Enterprise - worth checking if a client's compliance requirements come up mid-engagement.
Pricing: Free ($0, 30 credits/mo, unlimited collaborators), Pro ($25/mo, 100 credits, custom domains, code mode), Business ($50/mo, SSO, data-training opt-out), Enterprise (custom, SCIM, audit logs).
5. Greta — fast, ownable builds, with two things to know upfront
Greta generates a full-stack app - its own database and Python APIs included from a plain-English description, which makes it genuinely fast for producing a working client deliverable rather than just a UI mockup. For an agency, that speed is real. Two things are worth knowing before building a client workflow around it, though:
- Code export requires the Pro plan ($20/mo list, $5/mo promotional) — on an agency's per-client economics, that's a real cost to factor into the engagement, not a rounding error.
- Greta's own marketing elsewhere is explicitly positioned against hiring an agency — its /mvp-development-agency and /saas-mvp-agency pages tell founders to skip agency discovery calls and statements of work entirely. That doesn't stop an agency from using Greta as an internal tool, but it's a real thing to be aware of, not a reason to pretend it isn't there.
On the feature side, Greta does generate role-based access, searchable data tables, and approval workflows out of the box, which suits internal or admin-style client deliverables well. We recently used Greta to build an internal operations dashboard for a client who had been managing most of their workflow through spreadsheets. We built the dashboard with different user roles, searchable client data, and an approval workflow, then refined it based on the client's feedback.
The handoff was the part we were initially most concerned about. The client didn't want to be permanently dependent on our account or locked into the platform. Once the project was ready, we were able to export the code and hand it over, giving them ownership and the flexibility to continue developing it independently.
For us, that's where Greta made the most sense as an agency tool: it helped us move from the client's requirements to a working first version quickly, without making the final product dependent on the agency forever.
Pricing: Free ($0, 5 credits/day), Starter ($20/mo list, $5/mo promotional, 100 credits), Pro ($50/mo list, $20/mo promotional, 250 credits, database, team management, code export), Business ($200/mo, 1,000 credits), Enterprise (custom).
Sources: greta.sh/mvp-development-agency · greta.sh/pricing
6. Base44 — best for fast, collaborative client builds
Base44's speed makes it useful for quickly turning a client's requirements into a working prototype, but its collaboration features also make it practical for continuing the project beyond the initial pitch.
Base44's Canvas makes it particularly useful for collaborative client work. Multiple team members can work on the same canvas in real time, see each other's cursors, review every app page in one place, leave sticky-note feedback, sketch ideas, and send those instructions directly to the AI for implementation. This makes it useful beyond the pitch stage, especially when designers, developers, and account teams need to collaborate on the same client build.
Pricing: Free ($0, 25 message credits/month), Starter ($20/mo, 100 message credits), Builder ($50/mo, 250 message credits), Pro ($100/mo, 500 message credits), Elite ($200/mo, 1,200 message credits).
Sources: base44 page, greta.sh/alternative/base44
How to choose
- You need branded, permission-scoped client portals as your core deliverable → Retool or Softr.
- You want the largest pool of existing dev talent already building on the platform → Bubble (confirm the export limitation is acceptable to your engagement model first).
- You want real code handoff and a growing team that isn't penalized for more seats → Lovable.
- You want fast, ownable full-stack builds and are fine paying for export on a per-client basis → Greta.
- You need something fast for a pitch or discovery call, not the final deliverable → Base44.
- You want the broader picture beyond agency use specifically → see the full best AI app builders roundup.
Got an idea? Build it now!
Just start with a simple Prompt. No coding required — Greta.sh turns your idea into a working app in minutes.
Frequently asked questions
What is the best AI app builder for agencies? It depends on what the agency is optimizing for. Retool and Softr are strongest for client-facing portals with real permission systems. Bubble has the largest existing ecosystem of agencies building on it, though its lack of code export is a real handoff limitation. Lovable and Greta both generate genuinely ownable code with different collaboration and pricing tradeoffs.
What is an application builder? An application builder is a platform that lets you create a working software application — a website, internal tool, or client portal — by describing or visually assembling it, rather than writing all the code by hand. AI application builders like Greta, Lovable, and Base44 generate the app (including the backend) from a plain-language description; low-code platforms like Retool and Bubble give you pre-built components and visual logic tools to assemble it yourself.
How do I build a client portal without custom development? Platforms like Softr and Retool are built specifically for this — Softr for quickly branding a portal on a client's own domain with per-user-group permissions, and Retool for portals that need deeper governance, audit logging, or enterprise-grade permissions. Both let you stand up a working client portal without hiring a developer to build one from scratch.
What AI tools should agencies use to speed up client delivery? AI app builders that generate a working backend and UI from a description — Greta, Lovable, and Base44 — can cut the time from client brief to working demo significantly. Which one fits depends on whether the deliverable needs to be fully handed off with exportable code (Lovable or Greta, once on a plan that includes export) or is a faster, less permanent prototype for early-stage client work (Base44).
Can agencies white-label these tools under their own brand? Only partially, and it varies by platform. Softr allows full branding removal on its Professional plan ($139/mo) so a portal can appear entirely under the agency's or client's own brand.
Bottom line
There's no single best AI app builder for every agency — the right pick depends on whether the deliverable is a client portal (Retool or Softr), needs the largest existing talent pool (Bubble, with the export tradeoff in mind), needs real code handoff for a growing team (Lovable), or needs fast, ownable full-stack builds where you're comfortable paying for export per client (Greta). Try Greta free or see Greta's pricing to compare plans directly.
Last updated: August 18, 2026
JSON-LD (validate before publishing)
{
"@context": "https://schema.org",
"@graph": [
{
"@type": "Article",
"headline": "6 Best AI App Builders for Agencies: Top Tools in 2026",
"description": "The best AI app builders for agencies in 2026 — compared on client portals, handoff/ownership, and multi-client permissions, not just speed.",
"image": "[VERIFY: ogImage URL]",
"datePublished": "2026-08-18",
"dateModified": "2026-08-18",
"author": {
"@type": "Person",
"name": "Hiteshi",
"worksFor": { "@type": "Organization", "name": "Greta", "url": "https://www.greta.sh" }
},
"publisher": {
"@type": "Organization",
"name": "Questera",
"logo": { "@type": "ImageObject", "url": "[VERIFY: logo URL]" }
},
"mainEntityOfPage": { "@type": "WebPage", "@id": "https://www.greta.sh/blog/best-ai-app-builders-for-agencies" }
},
{
"@type": "BreadcrumbList",
"itemListElement": [
{ "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.greta.sh/" },
{ "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://www.greta.sh/blog" },
{ "@type": "ListItem", "position": 3, "name": "6 Best AI App Builders for Agencies", "item": "https://www.greta.sh/blog/best-ai-app-builders-for-agencies" }
]
},
{
"@type": "ItemList",
"itemListElement": [
{ "@type": "ListItem", "position": 1, "name": "Retool", "url": "https://www.greta.sh/alternative/retool" },
{ "@type": "ListItem", "position": 2, "name": "Softr", "url": "https://www.softr.io/" },
{ "@type": "ListItem", "position": 3, "name": "Bubble", "url": "https://www.greta.sh/alternative/bubble" },
{ "@type": "ListItem", "position": 4, "name": "Lovable", "url": "https://www.greta.sh/alternative/lovable" },
{ "@type": "ListItem", "position": 5, "name": "Greta", "url": "https://www.greta.sh/" },
{ "@type": "ListItem", "position": 6, "name": "Base44", "url": "https://www.greta.sh/alternative/base44" }
]
},
{
"@type": "Organization",
"name": "Greta",
"url": "https://www.greta.sh",
"logo": "[VERIFY: logo URL]"
},
{
"@type": "FAQPage",
"mainEntity": [
{
"@type": "Question",
"name": "What is the best AI app builder for agencies?",
"acceptedAnswer": {
"@type": "Answer",
"text": "It depends on the need. Retool and Softr are strongest for client-facing portals with real permission systems. Bubble has the largest existing agency ecosystem, though it lacks code export. Lovable and Greta both generate ownable code with different tradeoffs."
}
},
{
"@type": "Question",
"name": "What is an application builder?",
"acceptedAnswer": {
"@type": "Answer",
"text": "An application builder is a platform that lets you create a working software application by describing or visually assembling it rather than writing all the code by hand. AI app builders generate the backend automatically; low-code platforms give you pre-built components to assemble yourself."
}
},
{
"@type": "Question",
"name": "How do I build a client portal without custom development?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Platforms like Softr and Retool are built specifically for this — Softr for quickly branding a portal with per-user-group permissions, and Retool for portals needing deeper governance and audit logging."
}
},
{
"@type": "Question",
"name": "What AI tools should agencies use to speed up client delivery?",
"acceptedAnswer": {
"@type": "Answer",
"text": "AI app builders like Greta, Lovable, and Base44 can generate a working backend and UI from a description, cutting time from client brief to working demo significantly."
}
},
{
"@type": "Question",
"name": "Can agencies white-label these tools under their own brand?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Only partially, and it varies by platform. Softr allows full branding removal on its Professional plan. Other platforms in this comparison don't appear to offer platform-level white-labeling."
}
}
]
}
]
}
