Membrain vs TheirStack: CRM Platform vs Data Enrichment Tool Comparison

Membrain vs TheirStack: CRM Platform vs Data Enrichment Tool Comparison

Membrain is a CRM platform; TheirStack is a data enrichment tool. Whether you need one, the other, or both depends on which part of the workflow you are buying for: customer relationship management and sales pipeline tracking on one side, B2B lead data and contact enrichment on the other. This guide lays out what each vendor publishes.

The Quick Answer

Membrain is a CRM platform for customer relationship management and sales pipeline tracking; TheirStack is a data enrichment tool for B2B lead data and contact enrichment. By each vendor's own wording, Membrain lists prospecting with structure and guidance and active pipeline management, and TheirStack lists job search and company search.

TheirStack offers a lower entry point at $0/mo compared to Membrain at $49/mo.

If your priority is organizing contacts, tracking deals, and forecasting revenue, Membrain is the one built for it; for finding accurate contact data for target accounts, that is TheirStack. Many teams run one of each.

Understanding the Core Difference

Membrain is Membrain is a B2B sales CRM and growth platform that provides structure, guidance and insights for complex sales, sold as Prospecting, Active Pipeline and Account Growth products plus an Elevate coaching product. Prices are published per user per month in USD, EUR and SEK.

TheirStack is Job posting and technographics database for sales teams. Finds companies by the technologies they use and the roles they are hiring for, and enriches a company list with technographics and buying intent.

The two platforms take different approaches to solving the same core challenge.

Pricing Comparison

$49/moMembrain entry plan

Prospecting

FreeTheirStack entry plan

Free

Membrain Pricing (as of September 2026)

Source: Membrain Pricing

TheirStack Pricing (as of September 2026)

Source: TheirStack Pricing

Pricing Analysis

TheirStack offers the lower entry point ($0/mo vs $49/mo). Teams watching their budget will appreciate the savings, especially when starting out.

TheirStack includes a free tier, which is helpful for evaluating the platform without upfront cost.

Features Breakdown

Membrain lists

• Prospecting with structure and guidance
• Active pipeline management
• Account planning and growth
• Sales coaching (Elevate)
• Insight Engine AI with monthly credits
• Centralized customer data with a 360-degree view
• and 1 more listed below

TheirStack lists

• Job search
• Company search
• Company lookup
• Enrichment
• Exports
• Email alerts
• and 2 more listed below

Membrain Key Features

• Prospecting with structure and guidance
• Active pipeline management
• Account planning and growth
• Sales coaching (Elevate)
• Insight Engine AI with monthly credits
• Centralized customer data with a 360-degree view
• Playbooks

TheirStack Key Features

• Job search
• Company search
• Company lookup
• Enrichment
• Exports
• Email alerts
• Webhooks
• MCP server

The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.

Listed only by Membrain

• Prospecting with structure and guidance
• Active pipeline management
• Account planning and growth
• Sales coaching (Elevate)
• Insight Engine AI with monthly credits
• Centralized customer data with a 360-degree view
• Playbooks

Listed only by TheirStack

• Job search
• Company search
• Company lookup
• Enrichment
• Exports
• Email alerts
• Webhooks
• MCP server

Integration Ecosystem

Membrain Integrations

Membrain connects with: ActiveCampaign, Apollo, Fathom, Fortnox, Google Drive, Oneflow, Zapier, Zendesk, Zoom, ZoomInfo, ConnectWise, Constant Contact, DocuSign, HubSpot, Mailchimp, Outlook Calendar, Slack, Microsoft Teams, Webhooks.

TheirStack Integrations

TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.

Shared Integrations

Both tools integrate with: Zapier.

Integrations listed only by Membrain: ActiveCampaign, Apollo, Fathom, Fortnox, Google Drive, Oneflow, Zendesk, Zoom, ZoomInfo, ConnectWise, Constant Contact, DocuSign, HubSpot, Mailchimp, Outlook Calendar, Slack, Microsoft Teams, Webhooks.

Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N.

Use Case Recommendations

Best Fit for Membrain

• Budget-conscious teams looking for an affordable CRM platform
• Organizations with complex tech stacks needing broad integration support (19 integrations)
• Sales teams tracking deals from first touch to close
• Managers who need pipeline visibility and forecasting

Best Fit for TheirStack

• Budget-conscious teams looking for an affordable data enrichment tool
• Teams that need a wide feature set (8 capabilities listed)
• Teams that want to start free and scale up as needs grow
• Enterprise buyers who prefer custom pricing and dedicated support

Feature Comparison Summary

Getting Started Checklist

1. Define your customer relationship management and sales pipeline tracking and B2B lead data and contact enrichment requirements and monthly budget
2. Estimate your expected contacts and deals and data credits or contact lookups to find the right tier
3. List the integrations your team currently relies on
4. Sign up for free trials or demos of both platforms
5. Run a small test with each tool before making a commitment
6. Evaluate the onboarding experience and support quality

Final Thoughts

Membrain serves the customer relationship management and sales pipeline tracking side of an outbound stack and TheirStack the B2B lead data and contact enrichment side. TheirStack offers a more accessible entry point, while Membrain starts at $49/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.

Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.

Pricing and features verified as of September 2026. Visit Membrain and TheirStack for current information.