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

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

Koncert (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

Koncert 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, Koncert lists koncert cadence multi-channel sequencer across calls, emails, text, video and social and ai parallel dialer running 1 to 5 lines, and TheirStack lists job search and company search.

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

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

Koncert is Multi-channel sales engagement platform built around five sales dialers plus Koncert Cadence, a sequencer that runs phone, email, video, text and social touchpoints with bi-directional CRM sync.

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 SalesKoncert entry plan

Melody (AI Flow Dialer)

FreeTheirStack entry plan

Free

Koncert Pricing (as of September 2026)

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

Features Breakdown

Koncert lists

• Koncert Cadence multi-channel sequencer across calls, emails, text, video and social
• AI Parallel Dialer running 1 to 5 lines
• AI Flow Dialer single-line power dialer
• Remote Coach for live and recorded call listening
• Whisper Mode for live coaching during a call
• Fully managed Caller ID reputation with a heat map
• and 4 more listed below

TheirStack lists

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

Koncert Key Features

• Koncert Cadence multi-channel sequencer across calls, emails, text, video and social
• AI Parallel Dialer running 1 to 5 lines
• AI Flow Dialer single-line power dialer
• Remote Coach for live and recorded call listening
• Whisper Mode for live coaching during a call
• Fully managed Caller ID reputation with a heat map
• Automated local presence caller IDs
• Voicemail sequencing and voicemail drop
• AI objection detection with AI summary notes and transcriptions
• DataGenie waterfall data enrichment

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 Koncert

• Koncert Cadence multi-channel sequencer across calls, emails, text, video and social
• AI Parallel Dialer running 1 to 5 lines
• AI Flow Dialer single-line power dialer
• Remote Coach for live and recorded call listening
• Whisper Mode for live coaching during a call
• Fully managed Caller ID reputation with a heat map
• Automated local presence caller IDs
• Voicemail sequencing and voicemail drop
• AI objection detection with AI summary notes and transcriptions
• DataGenie waterfall data enrichment

Listed only by TheirStack

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

Integration Ecosystem

Koncert Integrations

Koncert connects with: Salesforce, HubSpot, Outreach, SalesLoft, Slack, Gong, Apollo.io.

TheirStack Integrations

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

Integrations listed only by Koncert: Salesforce, HubSpot, Outreach, SalesLoft, Slack, Gong, Apollo.io.

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

Use Case Recommendations

Best Fit for Koncert

• Teams that need a wide feature set (10 capabilities listed)
• Organizations with complex tech stacks needing broad integration support (7 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

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

Koncert 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 Koncert 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 Koncert and TheirStack for current information.