TL;DR: The Swarm is a relationship data infrastructure company, 580M profiles, API/MCP access, daily job-change tracking. Built for builders who assemble their own workflow. For B2B revenue teams that want a product (not infrastructure), Boomerang is the alternative: 4-pillar warm graph (team + customers + board/advisors + partners) plus end-to-end warm-intro motion, surfacing inside the B2B SaaS stack. This guide compares 5 alternatives by what you actually want, data or a product.
Top recommendation
Boomerang is the #1 The Swarm alternative for B2B revenue teams that want a product, not data
Boomerang does two things together that The Swarm doesn't ship as a finished product. (1) Maps the broadest warm graph in the category: four connector pillars (team + customers + board/advisors + partners), surfacing broader warm-path coverage than single-source competitors. (2) Runs the warm-intro motion end-to-end: drafts the ask, routes through the right connector, picks the moment, follows up, tracks to a booked meeting. Inside Slack, Salesforce, Outreach, and Gong. With The Swarm, you build the workflow yourself on top of raw data.
Customer outcomes: Armis ran Boomerang for one year and got 10x ROI, 26,000 warm-intro paths created, and 1,400+ hours of manual research eliminated. Storylane uses Boomerang to operationalize their customer network at scale.
What The Swarm does well
The Swarm is a strong product, but it's important to understand what they actually are: relationship data infrastructure for builders, not a workflow tool for end users. They provide:
- Relationship data on 580M profiles. Daily-refreshed job changes, work history, education, roles, contact data.
- Company data on 100M companies. Fundraising rounds, investor networks, valuations, team size changes.
- Network mapping AI. Maps intro paths between anyone based on company domain.
- Live enrichment. Up to 50K profile enrichments per day.
- Integrations everywhere. API, MCP server, Clay, Cargo, HubSpot, Attio, Airtable, Relay.
Camp 1: If you want a data infrastructure alternative
The Swarm's direct competitors in the data layer:
Cargo
AI agent platform with heavy data orchestration. Often runs Swarm as one source.
Clay
Data orchestration platform. Wires Swarm + Apollo + ZoomInfo + others into custom workflows. Most builders run Clay + Swarm together.
Apollo / Cognism / ZoomInfo
Traditional B2B contact data providers. Broader contact coverage; weaker on relationship mapping. Complementary to Swarm, not substitutes.
Camp 2: If you want a product, not raw data
If you started shopping Swarm and realized you don't want to build on raw data, the alternatives are workflow products with relationship intelligence baked in.
Boomerang, 4-pillar warm graph + end-to-end activation (top recommendation for product-buyers)
Best for: revenue teams whose pipeline depends on warm-intro motion at scale and who want a product (not infrastructure).
Where Boomerang wins vs Swarm: Out-of-the-box product. Maps the broadest warm graph (4 pillars: team + customers + board/advisors + partners) and runs the warm-intro motion end-to-end (drafting, routing, moment-picking, follow-up). The Swarm gives you raw data; Boomerang gives you the workflow and the agent.
Where Swarm wins vs Boomerang: If you want raw relationship data via API to build your own workflow at the deepest data depth, Swarm is unmatched (580M profiles). Boomerang's API surface is narrower.
Connect The Dots (CTD)
Best for: teams that want relationship intelligence across multiple use cases (sales, recruiting, partnerships, fundraising) in one platform.
Centralize
Best for: mid-market enterprise sales teams wanting a deal workspace with stakeholder mapping.
Vieu
Best for: enterprise sales teams running strategic, high-ACV pursuits.
Draftboard
Best for: founders and small teams wanting lightweight warm-intro tooling.
Side-by-side comparison
| Tool | Form factor | Discovery breadth | Activation |
|---|---|---|---|
| The Swarm | Data API | 580M profiles (DIY) | None (you build) |
| Boomerang | Product | 4 pillars (built-in) | End-to-end |
| CTD | Product | 1 source (team email) | Templates |
| Centralize | Product | 1 source (CRM) | Light |
| Vieu | Product | 1 source (team network) | Partial |
| Clay | Workflow engine | Multi-source (DIY) | None |
The honest decision framework
"We want raw relationship data infrastructure for builders." → Stay with The Swarm. Stack with Clay or Cargo for orchestration.
"We want a product that maps the broadest warm graph AND runs the warm-intro motion." → Boomerang. 4-pillar warm graph + end-to-end activation, out-of-the-box.
"Multi-use-case breadth across functions." → CTD.
"Deal workspace with stakeholder visibility." → Centralize.
"Strategic enterprise pursuits." → Vieu.
"Lightweight founder use." → Draftboard.
The deeper distinction: data infrastructure vs 4-pillar warm-intro product
The Swarm is the substrate, the data layer for builders. They're not in the same architectural position as workflow products. Among the workflow products (CTD, Centralize, Vieu, Draftboard, Boomerang), each is built differently.
Boomerang's specific wedge: the broadest warm graph in the category (4 connector pillars vs the typical 1-source competitor, surfacing broader path coverage) plus the agent that runs the activation motion end-to-end. Built around the B2B SaaS revenue motion (Salesforce, HubSpot, Outreach, Gong, Slack), with shipped enterprise customer outcomes.
A note on stacking Swarm with Boomerang
Many of our customers run both. Swarm provides underlying data depth (especially for teams that want broader coverage than Boomerang's native mapping). Boomerang sits on top, running the 4-pillar warm graph + warm-intro motion. Common and productive stack.
Bottom line
The Swarm is a strong data infrastructure platform. For B2B revenue teams that want a product (not raw data) with the broadest 4-pillar warm graph and end-to-end warm-intro motion, Boomerang is the platform that ships both halves out of the box.
Book a Boomerang demo. For the broader category view, see our Relationship Intelligence Platform Buyer's Guide.
Frequently asked questions
Is The Swarm a competitor to Boomerang?
They sit at different layers. The Swarm is relationship data infrastructure for builders: 580 million profiles, 100 million companies, daily-refreshed job changes, network mapping and live enrichment of up to 50,000 profiles a day, with API, MCP server and integrations to Clay, Cargo, HubSpot, Attio, Airtable and Relay. Boomerang is a finished workflow.
When should I choose The Swarm?
When you want data infrastructure and have the engineering capacity to build the workflow on top of it. That is a legitimate choice, and The Swarm is a strong product for it.
When should I choose Boomerang instead?
When you want the motion shipped rather than built. Boomerang maps four connector pillars and runs the intro end-to-end: drafts the ask, routes it through the right connector, picks the moment, follows up and tracks to a booked meeting, inside Slack, Salesforce, Outreach and Gong.
Can the two be stacked?
Yes. Teams that have already built on The Swarm's data sometimes add an orchestration layer rather than replace the data foundation.
