TheirStack vs Unify: Data Enrichment Tool vs Sales Engagement Platform Comparison
Compare TheirStack (data enrichment tool) and Unify (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 built for job search, company search, and technographic and buying-intent data, while Unify is a sales engagement platform built for multi-channel sequences across email, social messaging, and dialer with AI copywriting. Both start at $0/mo, so the right choice depends on whether the priority is finding contact data or coordinating outreach, and many teams use both together.
Key takeaways
- TheirStack's Free plan includes 50 company credits and 200 API credits per month, and its API, Webhooks and MCP plan costs $49/mo for 1,500 API credits per month.
- Unify's Base plan costs $20/mo for 800 credits per seat per month with unlimited seats, and its Pro plan costs $60/mo for 2,400 credits per seat per month.
- TheirStack lists 8 features including job search, company search, company lookup, enrichment, exports, email alerts, webhooks, and an MCP server.
- Unify lists 10 features including multi-channel sequences across email, social messaging and dialer, AI copywriting and personalization, signal-triggered automations, and a dialer that is currently in beta.
- TheirStack integrates with Clay, LinkedIn Audiences, Make, N8N, and Zapier, while Unify integrates with HubSpot, Salesforce, Slack, Gmail, and Microsoft Outlook.
Reviewed and updated September 5, 2026
TheirStack vs Unify: Data Enrichment Tool vs Sales Engagement Platform Comparison
TheirStack (data enrichment tool) and Unify (sales engagement platform) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
TheirStack is a data enrichment tool for B2B lead data and contact enrichment; Unify 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 Unify lists multi-channel sequences across email, social messaging and dialer and ai copywriting and personalization.
Both start at the same price point ($0/mo), so the decision comes down to features and workflow fit.
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 Unify. 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.
Unify is AI prospecting platform that pairs a B2B data and intent-signal layer with multi-channel sequencing across email, social messaging and a dialer, plus signal-triggered automations and managed mailboxes.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
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
Unify Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | Limited credits, up to 3 seats |
| Base | $20/mo | 800 credits / seat / mo, unlimited seats |
| Pro | $60/mo | 2,400 credits / seat / mo, unlimited seats |
| Business | Contact Sales | Custom credit pool per workspace |
Source: Unify Pricing
Pricing Analysis
Both platforms start at the same $0/mo price point. The decision comes down to which feature set and tier structure works better for your expected usage.
Both platforms offer free tiers, so you can test each one before spending anything.
Features Breakdown
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
- Multi-channel sequences across email, social messaging and dialer
- AI copywriting and personalization
- Signal-triggered automations
- Website intent and product usage signals
- Job change and hiring signals
- Phone and email enrichment
- and 4 more listed below
TheirStack Key Features
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Unify Key Features
- Multi-channel sequences across email, social messaging and dialer
- AI copywriting and personalization
- Signal-triggered automations
- Website intent and product usage signals
- Job change and hiring signals
- Phone and email enrichment
- Agentic chat for prospecting and list building
- Managed Gmail and Outlook mailboxes with warmup and rotation
- Dialer in beta
- Sequence, rep activity and signal analytics
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 Unify
- Multi-channel sequences across email, social messaging and dialer
- AI copywriting and personalization
- Signal-triggered automations
- Website intent and product usage signals
- Job change and hiring signals
- Phone and email enrichment
- Agentic chat for prospecting and list building
- Managed Gmail and Outlook mailboxes with warmup and rotation
- Dialer in beta
- Sequence, rep activity and signal analytics
Integration Ecosystem
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Unify Integrations
Unify connects with: HubSpot, Salesforce, Slack, Gmail, Microsoft Outlook.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Integrations listed only by Unify: HubSpot, Salesforce, Slack, Gmail, Microsoft Outlook.
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 Unify
- Budget-conscious teams looking for an affordable sales engagement platform
- Teams that need a wide feature set (10 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
| Feature | TheirStack | Unify |
|---|---|---|
| Starting Price | Free | Free |
| 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 Unify the multi-channel sales outreach and engagement tracking side. TheirStack offers a more accessible entry point, while Unify starts at $0/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 Unify for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between TheirStack and Unify?
- TheirStack is a data enrichment tool focused on B2B lead data, job search, company search, and technographics, while Unify is a sales engagement platform focused on multi-channel sales outreach across email, social messaging, and dialer with engagement tracking. They solve different parts of the outbound workflow rather than competing directly.
- Which one is cheaper, TheirStack or Unify?
- Both platforms start at the same $0/mo price point on their free plans. Beyond that, TheirStack's API, Webhooks and MCP plan is $49/mo for 1,500 API credits, while Unify's Base plan is $20/mo for 800 credits per seat and its Pro plan is $60/mo for 2,400 credits per seat.
- Can TheirStack and Unify be used together?
- Yes, many teams run one of each because they serve different jobs in the stack. TheirStack is used for finding accurate contact and company data, such as technographics and hiring signals, while Unify is used for coordinating outreach across email, phone, and social channels.
- What integrations does each platform support?
- TheirStack connects with Clay, LinkedIn Audiences, Make, N8N, and Zapier. Unify connects with HubSpot, Salesforce, Slack, Gmail, and Microsoft Outlook. Each platform lists five integrations, but they do not overlap based on the vendors' own listed integrations.
- Which platform has more features listed?
- Unify lists 10 features compared to TheirStack's 8 features, according to each vendor's own feature lists. Unify's features include multi-channel sequences, AI copywriting, signal-triggered automations, and a dialer currently in beta, while TheirStack's features center on job search, company search, enrichment, and data exports.
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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