JustCall vs TheirStack: Sales Engagement Platform vs Data Enrichment Tool Comparison
Compare JustCall (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.
JustCall is a sales engagement platform for multi-channel outreach and call tracking, priced from $29/mo across 5 tiers, while TheirStack is a data enrichment tool for B2B contact and company data, starting free across 4 tiers. JustCall lists 10 integrations, TheirStack lists 5, and many teams run both together for outreach plus data enrichment.
Key takeaways
- JustCall's entry plan, Team, costs $29/mo, while TheirStack's Free plan costs $0/mo with 50 company credits and 200 API credits per month.
- JustCall offers 5 pricing tiers, Team, Pro, Pro Plus, Business, and SalesPro, compared to TheirStack's 4 tiers, Free, App, API/Webhooks/MCP, and Datasets.
- JustCall integrates with 10 listed tools including Salesforce, HubSpot, and Slack, while TheirStack integrates with 5 listed tools including Clay and LinkedIn Audiences.
- Zapier is the only integration listed by both JustCall and TheirStack.
- TheirStack's API, Webhooks & MCP plan costs $49/mo and includes 1,500 API credits per month.
Reviewed and updated September 4, 2026
JustCall vs TheirStack: Sales Engagement Platform vs Data Enrichment Tool Comparison
Sales teams building an outbound stack often weigh JustCall, 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
JustCall 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, JustCall lists sales dialer and sms workflows, and TheirStack lists job search and company search.
TheirStack offers a lower entry point at $0/mo compared to JustCall at $29/mo.
If your priority is coordinating outreach across email, phone, and social channels, JustCall 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
JustCall is AI communication platform for sales and support teams combining a cloud phone system, sales dialer, SMS and WhatsApp inboxes, and multi-channel workflow automation. Adds AI call coaching, transcription, sentiment analysis and CRM integration.
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
Team
Free
JustCall Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Team | $29/mo | Per user; minimum license applies | Unlimited outbound minutes under fair usage; included SMS segments by region |
| Pro | $49/mo | Per user; minimum license applies | Unlimited outbound minutes under fair usage |
| Pro Plus | $89/mo | Minimum license: 2 | Unlimited outbound and inbound minutes under fair usage; 1,000 SMS segments |
| Business | Contact Sales | Minimum license: 10 | Unlimited calling & SMS |
| SalesPro | Contact Sales | Minimum license: 2 | Unlimited outbound calling under fair usage |
Source: JustCall 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 $29/mo). Teams watching their budget will appreciate the savings, especially when starting out.
JustCall offers 5 pricing tiers compared to TheirStack's 4, giving you more granularity as you scale.
TheirStack includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- Sales Dialer
- SMS Workflows
- Bulk SMS
- WhatsApp Inbox
- Call Recording
- Advanced Analytics
- and 4 more listed below
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
JustCall Key Features
- Sales Dialer
- SMS Workflows
- Bulk SMS
- WhatsApp Inbox
- Call Recording
- Advanced Analytics
- Automated Call Distribution
- Sentiment analysis
- AI call scoring
- Real-time agent assist
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 JustCall
- Sales Dialer
- SMS Workflows
- Bulk SMS
- WhatsApp Inbox
- Call Recording
- Advanced Analytics
- Automated Call Distribution
- Sentiment analysis
- AI call scoring
- Real-time agent assist
Listed only by TheirStack
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Integration Ecosystem
JustCall Integrations
JustCall connects with: Salesforce, HubSpot, Pipedrive, Zoho, Zapier, Slack, Copper, Intercom, Zendesk, Freshdesk.
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by JustCall: Salesforce, HubSpot, Pipedrive, Zoho, Slack, Copper, Intercom, Zendesk, Freshdesk.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N.
Use Case Recommendations
Best Fit for JustCall
- Budget-conscious teams looking for an affordable sales engagement platform
- Teams that need a wide feature set (10 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (10 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
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
| Feature | JustCall | TheirStack |
|---|---|---|
| Starting Price | $29/mo | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 10 | 8 |
| Integrations | 10 | 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
JustCall 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 JustCall starts at $29/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 JustCall and TheirStack for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between JustCall and TheirStack?
- JustCall is a sales engagement platform for multi-channel sales outreach and engagement tracking, while TheirStack is a data enrichment tool for B2B lead data and contact enrichment. They cover different parts of the sales workflow rather than competing directly, which is why many teams use both.
- How much does JustCall cost?
- JustCall's Team plan starts at $29/mo, with Pro at $49/mo and Pro Plus at $89/mo. The Business and SalesPro plans require contacting sales for pricing, giving JustCall 5 pricing tiers in total.
- Does TheirStack have a free plan?
- Yes, TheirStack's Free plan costs $0/mo and includes 50 company credits and 200 API credits per month. This gives teams a way to evaluate the platform before committing to a paid tier such as the $49/mo API, Webhooks & MCP plan.
- Which integrations do JustCall and TheirStack share?
- The two tools share only one listed integration, Zapier. JustCall separately connects with Salesforce, HubSpot, Pipedrive, Zoho, Slack, Copper, Intercom, Zendesk, and Freshdesk, while TheirStack connects with Clay, LinkedIn Audiences, Make, and N8N.
- Can a sales team use both JustCall and TheirStack together?
- Yes, the article notes that many teams run one of each. JustCall handles coordinating outreach across email, phone, and social channels, while TheirStack is used for finding accurate contact data for target accounts, so the two tools address different needs in the same 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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