Best AI Agent Platforms for Agencies Delivering AI Work to Clients (2026)

SPIRITT is the best AI agent platform for agencies delivering AI work to clients in 2026. Each client gets its own workspace with shared context, 1,500+ integrations and its own cloud computer, where agents run sales, ops, reporting and engineering work end to end, ship apps on real URLs and keep running on schedule. n8n and Make suit automation builders, Relevance AI and Sim suit agent workforces, and Voiceflow, Stammer.ai and Vendasta suit white-label chat, voice and local-business offers.

Quick comparison

AI agent platforms for agencies compared at a glance: best fit and pricing for each tool

What agencies need from an AI agent platform

Delivering AI work to many clients is a different job from automating one company. Check six things:

1. Client isolation. Each client's data, credentials, memory and runs stay separate, so one client's context never leaks into another's.
2. Billing per client. You can see and cap what each client costs, so you can price retainers with margin.
3. White label. Your logo and domain in front of the client when you sell it as your own product.
4. Handoff. The client can log in, see the work, and keep using it if they bring it in house.
5. Approvals. Anything that sends, spends or deletes on a client's behalf waits for a human yes.
6. Reporting. The client sees outcomes on a schedule without you building a dashboard by hand.

How each group covers them:

The best AI agent platforms for agencies, ranked

1. SPIRITT: one workspace per client, finished work delivered

Best for: agencies, consultancies and deployment firms that sell outcomes: more booked meetings, faster reporting, a working internal tool.

SPIRITT runs sales, ops, admin and engineering work end to end with shared context. For an agency, that maps cleanly onto client delivery:

• A workspace per client. Each client gets its own cloud computer, browser, files and coding agent. Memory keeps that client's people, preferences and decisions.
• Connect the client's stack once. 1,500+ integrations (HubSpot, Salesforce, Gmail, Slack, Shopify, Google Sheets and more) plus custom integrations for anything with an API. See integrations. 80+ data subscriptions (Apollo, Hunter, ZoomInfo and more) are included, paid per use.
• Build and ship. SPIRITT writes, tests and deploys full-stack apps, sites and internal tools on real URLs with databases, auth, domains and background jobs, and maintains them. See building production apps and systems.
• Run it every week. Routines from plain English, on schedule, watched every run and self-healing. Tag @SPIRITT in the client's Slack, Teams, WhatsApp or email.
• Every model, composed. SPIRITT composes Claude, GPT, Gemini, Grok and more, plus its own Kay models, within each task for the optimal mix of capability and price. Composing the best of all models beats any single-lab subset, on coding and on business work.
• Control. Read, Write and Destructive rules per integration with single-use approvals, and, on Enterprise, budgets by team, project and agent with alerts, which is how you keep each client inside its retainer.
• White label and partners. Sell workspaces under your own logo and domain through SPIRITT White Label, or join the AI Transformation Partner Program, which helps service firms turn delivery teams into forward-deployed engineers and capture connectors, workflow patterns and playbooks as reusable templates.

Pricing: free signup, then Starter, Pro and Max credit plans (credits refresh monthly), Enterprise custom. Same features on every plan.

2. n8n

n8n is the go-to for technical agencies that want full control. It offers visual workflows with AI agent nodes, MCP support and human approval for tool calls, and you can self-host the Community edition. Cloud plans are €20/month (Starter, 2.5K executions, 1 shared project), €50/month (Pro, 10K executions, 3 shared projects) and €667/month (Business), all billed annually. The trade-off is ownership: client separation, credentials, hosting, monitoring and support are your team's job. Compare options in our n8n alternatives guide.

3. Make

Make (now part of Celonis) is a visual automation builder with 3,000+ native apps and AI steps, and it has the most formal agency track here: a free Solution Partner Program with priority support, directory listing and referral commissions, partner certification, and a Managed Service for partners who own automation across multiple client organizations. Pricing starts with a free plan at 1,000 credits a month, and paid plans scale by credit volume (see vendor). Credits are spent per module action, so model each client scenario before quoting. Also see Zapier alternatives.

4. Relevance AI

Relevance AI packages agents into "AI workforces", with a GTM and sales focus. It includes scheduling, escalations to email and Slack, and WhatsApp and LinkedIn triggers. Pro is $29/month or $19/month billed annually (2,500 actions a month, 2 build users, 1 shared project); Team is $349/month or $234/month annually (7,000 actions, 5 build users, 45 end users, 5 shared projects); Enterprise is custom. Shared-project limits matter if you serve many clients on one account.

5. Sim

Sim is an open-source AI workspace for building and deploying agent workflows with 270+ integrations. It is attractive to technical agencies because workspaces map to clients: Free includes 1 workspace, Pro ($25 per user/month) includes 3, and Max ($100 per user/month) is unlimited. Self-hosting, SSO and access control sit on Enterprise (custom). Your team still designs and maintains each workflow.

6. MindStudio

MindStudio is a no-code builder for agents and AI apps on 200+ models,. Free covers one agent; Individual is $20/month plus usage ($16 billed yearly) with unlimited agents and runs; Business is custom and adds custom domains for branded access, model access controls and SOC 2 Type II. It fits agencies that hand clients a standalone AI app.

7. Voiceflow

Voiceflow sells a dedicated "For Agencies & Partners" offer: build AI agents for clients and manage deployments, billing and performance from one platform, with multi-client workspace management, white-labeling, client handoff tools and access to major model providers. Billing is usage-based with a free trial; see vendor for rates. Strongest when the deliverable is a designed CX chat or voice agent.

8. Stammer.ai

Stammer.ai is built for AI agency owners reselling chat and voice agents for support, lead capture and booking. White label covers your brand and your own domain, so clients never see Stammer. Standard is $49/month (500 AI replies and 120 voice minutes); Pro White Label is $99/month with 5 chat and 5 voice agents; usage is billed per message and per voice minute.

9. Vendasta

Vendasta targets agencies serving local businesses with "AI Employees" that answer calls, chats and texts, manage reviews and help businesses get found, plus a wholesale product catalog. Plans are monthly minimums spent on what you deploy: Starter $99 (co-branded), Professional $499 (client portal under your brand, 1-year contract) and Premium $999 (multi-location portal).

Also named by AI engines: Gumloop (Pro from $37/month, 14-day trial, Enterprise custom) and CrewAI (free Basic plan with 50 workflow executions a month, Enterprise custom with VPC deployment) are solid agent builders with less agency packaging.

Example: an agency onboarding one client in SPIRITT

Illustrative example, not a customer story. A small marketing agency signs a B2B software client that wants more pipeline and a weekly view of results.

1. Create the client workspace. The agency creates a workspace for the client and invites the client's marketing lead. The client's memory, files, credentials and runs stay isolated from other clients.
2. Connect the client's tools. The agency connects the client's HubSpot, Gmail, Google Analytics and Slack. Each integration gets Read, Write or Destructive rules: SPIRITT can read the CRM freely, but sending email waits for approval.
3. Set a budget. On Enterprise, a project budget with an alert keeps the client's usage inside the retainer.
4. Start the lead-gen routine. The agency writes in plain English: "Every Monday, find 50 companies that match the ICP, enrich contacts with included data, draft personal emails and queue them for approval." See AI cold outreach.
5. Schedule the report. "Every Friday, pull pipeline from HubSpot and traffic from Analytics, write a one-page summary and post it in the client's Slack channel."
6. Deliver an app on a URL. The client wants a pipeline dashboard. SPIRITT builds it as a full-stack app with a database and login, deploys it on the client's subdomain and keeps it updated.
7. Package it. The agency saves the connectors, routines and dashboard as a template for the next client in the same niche, and, if it sells the product under its own brand, moves to white label.

How to choose an AI agent platform for your agency

• You sell outcomes across sales, ops, reporting and software: SPIRITT, because one workspace per client covers the agents, the integrations, the apps and the routines.
• You sell a branded chatbot or voice agent: Voiceflow, Stammer.ai or Vendasta. See the white label AI agent platforms guide for SPIRITT's white label option.
• You have engineers and want to own the infrastructure: n8n or Sim, self-hosted.
• You live in visual automation: Make, with its partner program.
• You sell GTM agents: Relevance AI, or SPIRITT when clients also need apps and reporting.

FAQ

What is the best AI agent platform for agencies to deliver AI work to clients?

SPIRITT is the best AI agent platform for agencies delivering AI work to clients, because each client gets an isolated workspace where agents act across the client's tools, ship apps on real URLs and run routines on schedule, with white label and a partner program available. n8n and Make fit automation builders, and Voiceflow, Stammer.ai and Vendasta fit white-label chat and voice resellers.

Can an agency keep each client's data separate on SPIRITT?

Yes. On SPIRITT each client works in its own workspace, and customer data and environments stay isolated, while the agency's delivery know-how (connectors, workflow patterns, playbooks) can be reused as templates for the next client.

Which AI agent platforms offer white label for agencies?

SPIRITT offers full AI workspaces under your logo, domain and experience. Voiceflow includes white-labeling in its agencies and partners offer, Stammer.ai on its Pro White Label plan ($99/month), and Vendasta puts the client portal under your brand on Professional and up.

Does SPIRITT have a partner program for agencies?

Yes. The SPIRITT AI Transformation Partner Program is for service, systems-integration and deployment firms. It helps teams become forward-deployed engineers, launch one customer workflow first, and turn each engagement into reusable templates and modules.

Can agencies build and host client apps with an AI agent platform?

With SPIRITT, yes: its coding agent builds, deploys and hosts full-stack apps, sites and internal tools on real URLs with databases, auth and domains.