AI Agents

Top 12 alternatives to Synthflow

No-code AI voice agents for booking, support, and sales calls. Here are 12 other ai agents tools — ranked by rating, review volume, and how well they overlap with your existing stack.

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The tool you're comparing

New this month

Synthflow

No-code AI voice agents for booking, support, and sales calls

4.4(162)

From ~$0.08/min + plans

12 alternatives

New this month

OpenClaw

Open-source AI agent for messaging, browser automation, and smart home control

4.8(12,400)

Free / open-source

New this month

Google Gemini

Google's flagship AI assistant — across search, workspace, and daily life

4.6(18,500)

Free / $20/mo (Google One AI Premium)

Claude Code

Agentic coding tool by Anthropic for the terminal

4.8(3,200)

Usage-based / included in Max plan

New this month

Google Antigravity

Google's free agentic IDE — Gemini 3 built in, 76% SWE-bench score

4.8(3,200)

Free

New this month

Lindy AI

Build custom AI employees for email, CRM, sales, and support — no code needed

4.5(4,200)

Free (400 credits/mo) / from $49.99/mo

New this month

Manus AI

Autonomous AI agent that browses, codes, and builds apps in the background

4.5(5,800)

Free (300 credits/day) / from $39/mo

Genspark

AI Super Agent that handles entire workflows end-to-end

4.5(2,800)

Free / from $25/mo

New this month

Pipedream

Developer-first automation platform for AI agents and multi-step workflows

4.6(4,100)

Free / from $29/mo

Microsoft 365 Copilot

AI assistant embedded across Microsoft 365 apps

4.3(7,800)

$30/user/mo add-on

New this month

Activepieces

Open-source AI automation platform — a privacy-first Zapier alternative

4.6(3,400)

Free (1,000 tasks/mo) / from $25/mo

New this month

CrewAI

The leading platform for orchestrating multi-agent AI teams

4.7(3,800)

Free (OSS) / Enterprise custom

UiPath

AI-powered robotic process automation platform

4.6(4,500)

Free / custom pricing

How we ranked these

Alternatives are scored on a blend of average rating, review volume, integration overlap with Synthflow, and editorial verification. We exclude apps from other categories so you only see real like-for-like options. All listings are independent — no tool pays to appear here.