Humanlinker vs TheirStack: Sales Engagement Platform vs Data Enrichment Tool Comparison
Compare Humanlinker (sales engagement platform) and TheirStack (data enrichment tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Humanlinker is a sales engagement platform for multi-channel outreach and engagement tracking, starting at $75 per month. TheirStack is a data enrichment tool for B2B lead data and contact enrichment, with a free entry tier. Humanlinker fits teams coordinating outreach across email, phone, and social channels, while TheirStack fits teams needing accurate contact and company data.
Key takeaways
- Humanlinker's Pro plan costs $75 per month and includes 1 user, selectable up to 5 users, plus 200 AI credits per month.
- TheirStack's Free plan costs $0 per month and includes 50 company credits and 200 API credits per month.
- TheirStack offers 4 pricing tiers, while Humanlinker offers 3 pricing tiers.
- TheirStack's API, Webhooks & MCP plan costs $49 per month for 1,500 API credits.
- Humanlinker integrates with HubSpot, Salesforce, Microsoft Dynamics, and Claude via MCP, while TheirStack integrates with Clay, LinkedIn Audiences, Make, N8N, and Zapier.
Reviewed and updated September 5, 2026
Humanlinker vs TheirStack: Sales Engagement Platform vs Data Enrichment Tool Comparison
Sales teams building an outbound stack often weigh Humanlinker, a sales engagement platform for multi-channel sales outreach and engagement tracking, against TheirStack, a data enrichment tool for B2B lead data and contact enrichment. 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
Humanlinker is a sales engagement platform for multi-channel sales outreach and engagement tracking; TheirStack is a data enrichment tool for B2B lead data and contact enrichment. By each vendor's own wording, Humanlinker lists multichannel engagement and unlimited multichannel campaign sending, and TheirStack lists job search and company search.
TheirStack offers a lower entry point at $0/mo compared to Humanlinker at $75/mo.
If your priority is coordinating outreach across email, phone, and social channels, Humanlinker 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
Humanlinker is AI sales copilot that runs targeted outbound campaigns across email, social networks and calls. It recommends prospects, enriches emails and phone numbers, generates personalized copy and icebreakers, automates multichannel sequences with warm-up and inbox rotation, and analyzes replies.
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
Pro
Free
Humanlinker Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Pro | $75/mo | 1 user, selectable up to 5 users; 200 AI credits / month | 2 email & 1 social account connected; unlimited multichannel campaign sending |
| Business | Contact Sales | From 50 users | Custom quotas (AI credits, enrichment volume, inbox volume, contacts recommendations) |
| Enterprise | Contact Sales | From 50 users | Custom quotas plus VIP support and training with a dedicated account manager |
Source: Humanlinker Pricing
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
Pricing Analysis
TheirStack offers the lower entry point ($0/mo vs $75/mo). Teams watching their budget will appreciate the savings, especially when starting out.
TheirStack offers 4 pricing tiers compared to Humanlinker's 3, giving you more granularity as you scale.
TheirStack includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- Multichannel Engagement
- Unlimited multichannel campaign sending
- Automatic sending of Social InMails
- AI Sales Copywriting
- Leads recommendation
- Waterfall Enrichment
- and 4 more listed below
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
Humanlinker Key Features
- Multichannel Engagement
- Unlimited multichannel campaign sending
- Automatic sending of Social InMails
- AI Sales Copywriting
- Leads recommendation
- Waterfall Enrichment
- Email & Social Warm-up
- Inbox rotation
- Unified inbox
- AI Meeting Prep
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 Humanlinker
- Multichannel Engagement
- Unlimited multichannel campaign sending
- Automatic sending of Social InMails
- AI Sales Copywriting
- Leads recommendation
- Waterfall Enrichment
- Email & Social Warm-up
- Inbox rotation
- Unified inbox
- AI Meeting Prep
Listed only by TheirStack
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Integration Ecosystem
Humanlinker Integrations
Humanlinker connects with: HubSpot, Salesforce, Microsoft Dynamics, Claude via MCP.
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Integrations listed only by Humanlinker: HubSpot, Salesforce, Microsoft Dynamics, Claude via MCP.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Use Case Recommendations
Best Fit for Humanlinker
- Teams that need a wide feature set (10 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
- SDR teams running multi-channel outreach sequences
- Sales managers tracking team engagement metrics
Best Fit for TheirStack
- Budget-conscious teams looking for an affordable data enrichment tool
- Organizations with complex tech stacks needing broad integration support (5 integrations)
- 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 | Humanlinker | TheirStack |
|---|---|---|
| Starting Price | $75/mo | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 10 | 8 |
| Integrations | 4 | 5 |
| Founded | N/A | 2021 |
Getting Started Checklist
- Define your multi-channel sales outreach and engagement tracking and B2B lead data and contact enrichment requirements and monthly budget
- Estimate your expected sequences and engagement actions and data credits or contact lookups 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
Humanlinker serves the multi-channel sales outreach and engagement tracking side of an outbound stack and TheirStack the B2B lead data and contact enrichment side. TheirStack offers a more accessible entry point, while Humanlinker starts at $75/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 Humanlinker and TheirStack for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between Humanlinker and TheirStack?
- Humanlinker is a sales engagement platform built for multi-channel outreach and engagement tracking across email, social, and calls. TheirStack is a data enrichment tool focused on B2B lead data, company lookup, and contact enrichment using job postings and technographics. They cover different parts of the outbound workflow rather than competing directly.
- How much does Humanlinker cost?
- Humanlinker's Pro plan costs $75 per month and includes 1 user, selectable up to 5 users, 200 AI credits per month, and 2 email plus 1 social account connected with unlimited multichannel campaign sending. Business and Enterprise plans require contacting sales for custom pricing and quotas.
- How much does TheirStack cost?
- TheirStack has a Free plan at $0 per month with 50 company credits and 200 API credits per month. Its App plan is usage-based with company credit packs from 1,000 to 200,000 credits, and its API, Webhooks & MCP plan costs $49 per month for 1,500 API credits. A Datasets plan requires contacting sales.
- What integrations does each tool support?
- Humanlinker connects with HubSpot, Salesforce, Microsoft Dynamics, and Claude via MCP. TheirStack connects with Clay, LinkedIn Audiences, Make, N8N, and Zapier. The two platforms list no overlapping integrations, so the ecosystems serve different parts of a sales stack.
- Should I use Humanlinker, TheirStack, or both?
- If the priority is coordinating outreach across email, phone, and social channels, Humanlinker is built for that. If the priority is finding accurate contact and company data for target accounts, TheirStack fits better. The article notes that many teams run one of each to cover both parts of the workflow.
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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