Best agent platforms that are free to start

No separate charge for the SDK — you pay for underlying Workers and Durable Objects. Workers has a free tier (100k req/day) and a paid plan from $5/mo; Durable Objects bills requests, duration, and (from Jan 2026) SQLite storage.

Framework is free (MIT). Managed: Developer $0/seat (up to 5k base traces/mo), Plus $39/seat/mo, Enterprise custom; usage add-ons include deployment runs at $0.005/run.

The SDK library is free (the Python repo is MIT), but use is governed by Anthropic's Commercial Terms of Service and you pay Claude API token costs (or via Bedrock/Vertex/Azure).

Self-hosted is free (Apache-2.0). Cloud Starter $0/mo with usage metering, Cloud Teams $250/mo, Enterprise custom; add-ons include memory at $10/1M tokens.

Self-hosted Community Edition is free. Cloud (billed annually): Starter EUR20/mo (2.5K executions), Pro EUR50/mo (10K executions), Business EUR667/mo (40K, self-hosted), Enterprise custom — all with unlimited users, workflows, and integrations.

Basic is free (visual editor, AI copilot, GitHub integration, 50 workflow executions/mo). Enterprise is custom-priced (request a trial); no public figure.

Usage-based on two units — an "Action" (a tool run) and "Vendor Credits" (model cost). Free sign-up includes a one-time 1,000 Vendor Credits plus 200 Actions/month; top-ups are $80 per 1,000 Actions and $20 per 10,000 Vendor Credits; Enterprise is contact-sales.

The SDK is free and open source (MIT); you pay OpenAI (or the chosen provider's) API/token costs.

The SDK is free and open source (MIT); you pay the underlying model/token costs of whichever provider you route to. Vercel's hosting and AI Gateway are billed separately.

Metered by "activities" (a trigger, knowledge answer, action run, web browse/scrape, or web search each count as 1 activity). Free includes 400 activities/mo; Pro includes 1,500/mo; Enterprise is custom. Agents do not consume the core Zapier task quota. Exact paid-tier dollar figures for Agents were not available at access time (the pricing URL returned 404).

Dify Cloud: Sandbox is free (200 message credits, 1 workspace, 5 apps); Professional is $59/workspace/mo (5,000 credits/mo); Team is $159/workspace/mo (10,000 credits/mo). A self-hosted community edition is available separately.

Hobby (free) includes a one-time $100 usage credit, up to 1-hour sessions, and 20 concurrent sandboxes. Pro is $150/mo + usage (24-hour sessions, up to 100 concurrent). Usage is per-second (e.g. 1 vCPU at $0.000014/s).

Usage-based, billed per second while running (e.g. shared-cpu-1x/256MB roughly $2/mo; performance-1x/2GB roughly $32/mo). Volumes are $0.15/GB-month and egress varies by region. No standing free tier is advertised.

Starter is $0 base + $30/mo of free compute credits; Team is $250/mo base + $100/mo credits; Enterprise is custom. Usage is per-second (e.g. H100 GPU at $0.001097/s, CPU at $0.0000131/core/s).

An effort/credit model with monthly credits per tier: Starter (free) with daily Agent credits and one published project; Core $20/mo (billed annually) with $25/mo of credits; Pro $95/mo with $100/mo of credits; Enterprise custom.

Freemium — the site describes a tenant-wide credit pool that funds compute, model usage, voice, channels, and storage, plus optional per-agent subscriptions, and is self-serve from the dashboard; no specific dollar figures or tier table are published in a verifiable form.

Managed cloud: Pro $42.50/mo and Max $272.00/mo (billed annually), with pay-as-you-go credits; no free cloud tier. Self-hosting is free.

Plus $49.99/mo, Pro $99.99/mo, Max $199.99/mo, Enterprise custom. No free tier — a 7-day free trial (no card). Metered in credits (most tasks 1-3 credits on basic models, ~10 on large; minimum 1/task; no rollover).