PersistIQ vs TheirStack: Sales Engagement Platform vs Data Enrichment Tool Comparison

PersistIQ vs TheirStack: Sales Engagement Platform vs Data Enrichment Tool Comparison

PersistIQ (sales engagement platform) and TheirStack (data enrichment tool) 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

PersistIQ 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, PersistIQ lists multi-channel sales outreach and prospecting, and TheirStack lists job search and company search.

TheirStack publishes an entry price of $0/mo; PersistIQ uses custom pricing, so the two cannot be compared on list price.

If your priority is coordinating outreach across email, phone, and social channels, PersistIQ 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

PersistIQ is Sales engagement platform for small teams that builds prospect lists, automates personalized email, call and task sequences, and syncs activity with a CRM.

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

Contact SalesPersistIQ entry plan

All plans

FreeTheirStack entry plan

Free

PersistIQ Pricing (as of September 2026)

Source: PersistIQ Pricing

TheirStack Pricing (as of September 2026)

Source: TheirStack Pricing

Pricing Analysis

One or both platforms use custom or contact-based pricing for some tiers. Reach out to their sales teams for exact quotes based on your usage needs.

TheirStack offers 4 pricing tiers compared to PersistIQ's 1, giving you more granularity as you scale.

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

Features Breakdown

PersistIQ lists

• Multi-channel Sales Outreach
• Prospecting
• Sales Email AI
• Chrome Extension
• A/B test
• Reporting
• and 2 more listed below

TheirStack lists

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

PersistIQ Key Features

• Multi-channel Sales Outreach
• Prospecting
• Sales Email AI
• Chrome Extension
• A/B test
• Reporting
• CRM Integrations
• 14-day free trial

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 PersistIQ

• Multi-channel Sales Outreach
• Prospecting
• Sales Email AI
• Chrome Extension
• A/B test
• Reporting
• CRM Integrations
• 14-day free trial

Listed only by TheirStack

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

Integration Ecosystem

PersistIQ Integrations

PersistIQ connects with: Salesforce, Copper, Pipedrive, HubSpot, Gmail, Outlook, Zapier.

TheirStack Integrations

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

Shared Integrations

Both tools integrate with: Zapier.

Integrations listed only by PersistIQ: Salesforce, Copper, Pipedrive, HubSpot, Gmail, Outlook.

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

Use Case Recommendations

Best Fit for PersistIQ

• Organizations with complex tech stacks needing broad integration support (7 integrations)
• 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
• 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 multi-channel sales outreach and engagement tracking and B2B lead data and contact enrichment requirements and monthly budget
2. Estimate your expected sequences and engagement actions 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

PersistIQ 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 publishes an entry price (a free tier), while PersistIQ uses custom pricing for its plans, so compare on features and on the quote you receive. 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 PersistIQ and TheirStack for current information.