TheirStack vs Zeekeo: Data Enrichment Tool vs Sales Engagement Platform Comparison
Compare TheirStack (data enrichment tool) and Zeekeo (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
TheirStack is a data enrichment tool for B2B lead data and contact enrichment, priced from free up to $49/mo for API access. Zeekeo is a sales engagement platform for multi-channel outreach, starting at $149/mo per seat. Teams needing accurate contact data should pick TheirStack; teams coordinating outreach across channels should pick Zeekeo, and many run both.
Key takeaways
- TheirStack's entry plan is free with 50 company credits and 200 API credits per month, while Zeekeo's DIY plan starts at $149/mo per seat.
- TheirStack offers 4 pricing tiers compared to Zeekeo's 2 tiers.
- TheirStack lists 8 features including job search, company search, and an MCP server, while Zeekeo lists 10 features including AI-powered messaging and targeted calling.
- TheirStack integrates with Clay, LinkedIn Audiences, Make, and N8N, while Zeekeo integrates with HubSpot, Salesforce, Google, and Microsoft.
- Zapier is the only integration listed by both TheirStack and Zeekeo.
Reviewed and updated September 4, 2026
TheirStack vs Zeekeo: Data Enrichment Tool vs Sales Engagement Platform Comparison
Sales teams building an outbound stack often weigh TheirStack, a data enrichment tool for B2B lead data and contact enrichment, against Zeekeo, a sales engagement platform for multi-channel sales outreach and engagement tracking. They cover different parts of the workflow, so this comparison covers what each one does, what each one costs, and where they overlap.
The Quick Answer
TheirStack is a data enrichment tool for B2B lead data and contact enrichment; Zeekeo is a sales engagement platform for multi-channel sales outreach and engagement tracking. By each vendor's own wording, TheirStack lists job search and company search, and Zeekeo lists email + linkedin outreach and ai-powered messaging & sequences.
TheirStack offers a lower entry point at $0/mo compared to Zeekeo at $149/mo.
If your priority is finding accurate contact data for target accounts, TheirStack is the one built for it; for coordinating outreach across email, phone, and social channels, that is Zeekeo. Many teams run one of each.
Understanding the Core Difference
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.
Zeekeo is Outbound platform that runs email and LinkedIn campaigns from one system, with prospecting and data enrichment, AI-powered messaging and sequences, A/B testing and reply intelligence. Sold either as self-serve seats or as a managed service where Zeekeo builds and runs the outbound motion.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Free
Zeekeo DIY
TheirStack Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 50 company credits and 200 API credits per month |
| App | Usage-based | Company credit packs from 1,000 to 200,000 credits |
| API, Webhooks & MCP | $49/mo | 1,500 API credits per month |
| Datasets | Contact Sales | Jobs, Technographics and Buying intents datasets |
Source: TheirStack Pricing
Zeekeo Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Zeekeo DIY | $149/mo | Per seat; volume discounts on more seats | Not published |
| Zeekeo Done-For-You | Contact Sales | Managed service | Not published |
Source: Zeekeo Pricing
Pricing Analysis
TheirStack is more affordable at the entry level ($0/mo vs $149/mo). For teams with tight budgets or those just getting started with B2B lead data and contact enrichment and multi-channel sales outreach and engagement tracking, this price difference matters.
TheirStack offers 4 pricing tiers compared to Zeekeo's 2, giving you more granularity as you scale.
TheirStack includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
- Email + LinkedIn outreach
- AI-powered messaging & sequences
- Smart campaign automation
- A/B testing & optimization
- Analytics & performance dashboards
- AI-generated responses & insights
- and 4 more listed below
TheirStack Key Features
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Zeekeo Key Features
- Email + LinkedIn outreach
- AI-powered messaging & sequences
- Smart campaign automation
- A/B testing & optimization
- Analytics & performance dashboards
- AI-generated responses & insights
- LinkedIn post creation & scheduling
- Image & GIF personalization
- Workflow automation
- Targeted calling & appointment setting
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 TheirStack
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Listed only by Zeekeo
- Email + LinkedIn outreach
- AI-powered messaging & sequences
- Smart campaign automation
- A/B testing & optimization
- Analytics & performance dashboards
- AI-generated responses & insights
- LinkedIn post creation & scheduling
- Image & GIF personalization
- Workflow automation
- Targeted calling & appointment setting
Integration Ecosystem
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Zeekeo Integrations
Zeekeo connects with: HubSpot, Salesforce, Zapier, Google, Microsoft.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N.
Integrations listed only by Zeekeo: HubSpot, Salesforce, Google, Microsoft.
Use Case Recommendations
Best Fit for TheirStack
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that want to start free and scale up as needs grow
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for Zeekeo
- Mid-market to enterprise teams with established multi-channel sales outreach and engagement tracking budgets
- Teams that need a wide feature set (10 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | TheirStack | Zeekeo |
|---|---|---|
| Starting Price | Free | $149/mo |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 8 | 10 |
| Integrations | 5 | 5 |
| Founded | 2021 | N/A |
Getting Started Checklist
- Define your B2B lead data and contact enrichment and multi-channel sales outreach and engagement tracking requirements and monthly budget
- Estimate your expected data credits or contact lookups and sequences and engagement actions to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
TheirStack serves the B2B lead data and contact enrichment side of an outbound stack and Zeekeo the multi-channel sales outreach and engagement tracking side. TheirStack offers a more accessible entry point, while Zeekeo starts at $149/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 TheirStack and Zeekeo for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between TheirStack and Zeekeo?
- TheirStack is a data enrichment tool built for B2B lead data and contact enrichment, using job search and company search features. Zeekeo is a sales engagement platform for multi-channel outreach, offering email plus LinkedIn outreach and AI-powered messaging and sequences. They serve different parts of the outbound workflow rather than competing directly.
- How much does TheirStack cost compared to Zeekeo?
- TheirStack starts free with 50 company credits and 200 API credits per month, and its API, Webhooks and MCP plan costs $49/mo. Zeekeo's DIY plan starts at $149/mo per seat, with volume discounts for more seats, while its Done-For-You managed service requires contacting sales.
- Which integrations does each platform support?
- TheirStack connects with Clay, LinkedIn Audiences, Make, N8N, and Zapier. Zeekeo connects with HubSpot, Salesforce, Zapier, Google, and Microsoft. Zapier is the only integration listed by both tools.
- Can TheirStack and Zeekeo be used together?
- Yes, many teams run both since they cover different workflow stages. TheirStack finds and enriches B2B lead data with job search and technographics, while Zeekeo then runs the multi-channel outreach and engagement tracking on top of that enriched contact data.
- Who is Zeekeo best suited for?
- Zeekeo best fits mid-market to enterprise teams with established multi-channel sales outreach and engagement tracking budgets. It suits teams that need a wide feature set, listing 10 capabilities including AI-powered messaging, A/B testing, and targeted calling and appointment setting.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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