Best StackAI alternatives

Comparison

Tool	Price from	Free plan	Category
StackAI	not listed	yes	Business & sales
Attio	39 EUR/mo	yes	Business & sales
WRITER	not listed	trial	Business & sales
Apollo.io	49 USD/mo	yes	Business & sales
FirmOS	not listed	?	Business & sales
Copy.ai	24 USD/mo	trial	Business & sales
Hex	36 USD/mo	yes	Business & sales
Glean	not listed	?	Business & sales
Relevance AI	not listed	?	AI agents

Each alternative in short

1. Attio

AI-native CRM that builds pipeline, advances deals and grows accounts with agents and automations, for revenue and sales teams.

Yes, there is a free plan. Free plan for up to 3 seats, real-time contact syncing and automatic data enrichment; no credit card required.

2. WRITER

Enterprise AI agent platform that runs on-brand, compliant marketing and sales work for large organizations.

There is a free trial. 14-day free trial of the Starter plan, no credit card required.

3. Apollo.io

AI go-to-market platform combining B2B contact data, AI agents and outreach tools for sales and revenue teams.

Yes, there is a free plan. Free plan for exploring Apollo or light usage; free trial gives access to most features before committing to a paid plan.

4. FirmOS

AI-driven automation and custom systems for accounting firms covering client acquisition, hiring and internal operations.

The vendor does not state this clearly on the homepage or pricing page.

5. Copy.ai

AI-native GTM platform that automates sales, marketing and operations workflows for revenue teams in one place.

There is a free trial. Free trial available via the 'Try for free' button; the free plan details are not listed in the provided text.

6. Hex

Collaborative data workspace where analysts and business users ask questions, build notebooks and apps, and use AI agents on data.

Yes, there is a free plan. Community plan: free, includes Hex agent trial, connections to any data source, all cell types and small compute.

7. Glean

Enterprise AI platform connected to company data, for finding information, building agents and automating work across business systems.

The vendor does not state this clearly on the homepage or pricing page.

8. Relevance AI

Platform for building and running specialist AI agents for sales, customer success, marketing, HR and operations teams.

The vendor does not state this clearly on the homepage or pricing page.

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