Closely vs Seamless.AI: Sales Engagement Platform vs Data Enrichment Tool Comparison
Compare Closely (sales engagement platform) and Seamless.AI (data enrichment tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Closely is a sales engagement platform built for multichannel outreach across LinkedIn and email, priced from $49/mo, while Seamless.AI is a data enrichment tool for B2B contact search and lookups, with a free entry tier. Teams coordinating outbound campaigns fit Closely; teams needing accurate contact data fit Seamless.AI, and many use both.
Key takeaways
- Closely's Starter plan costs $49/mo and includes 1 LinkedIn account with unlimited email accounts.
- Seamless.AI offers a Free plan with 50 credits, giving it a lower entry point than Closely.
- Closely lists 4 pricing tiers (Starter, Growth, Essential, Custom) compared to Seamless.AI's 3 tiers (Free, Pro, Enterprise).
- Both platforms integrate with Salesforce and Pipedrive, though Closely also connects with HubSpot, GoHighLevel, Gmail, Outlook, SMTP, and Webhooks.
- Seamless.AI integrates with Outreach, SalesLoft, Microsoft Dynamics 365, and Zapier, none of which appear in Closely's integration list.
Reviewed and updated September 4, 2026
Closely vs Seamless.AI: Sales Engagement Platform vs Data Enrichment Tool Comparison
Closely is a sales engagement platform; Seamless.AI is a data enrichment tool. Whether you need one, the other, or both depends on which part of the workflow you are buying for: multi-channel sales outreach and engagement tracking on one side, B2B lead data and contact enrichment on the other. This guide lays out what each vendor publishes.
The Quick Answer
Closely is a sales engagement platform for multi-channel sales outreach and engagement tracking; Seamless.AI is a data enrichment tool for B2B lead data and contact enrichment. By each vendor's own wording, Closely lists multichannel campaigns across linkedin and email and conditional sequence builder, and Seamless.AI lists real-time b2b contact search engine and email and cell phone lookups.
Seamless.AI offers a lower entry point at $0/mo compared to Closely at $49/mo.
If your priority is coordinating outreach across email, phone, and social channels, Closely is the one built for it; for finding accurate contact data for target accounts, that is Seamless.AI. Many teams run one of each.
Understanding the Core Difference
Closely is Outbound platform that runs automated campaigns across LinkedIn and email from a shared sender, with a conditional sequence builder, unified inbox, contact enrichment and AI personalization agents.
Seamless.AI is AI-powered sales lead platform with real-time contact search engine, pitch intelligence, and data enrichment for B2B prospecting.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Free
Closely Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Starter | $49/mo | 1 LinkedIn account, unlimited email accounts |
| Growth | $127/mo | 3 LinkedIn accounts, unlimited email accounts, 3,000 bonus credits/mo |
| Essential | $205/mo | 5 LinkedIn accounts, unlimited email accounts, 5,000 bonus credits/mo |
| Custom | Contact Sales | Unlimited seats, custom LinkedIn accounts and credits |
Source: Closely Pricing
Seamless.AI Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 50 Credits |
| Pro | Contact Sales | Annual Credit Packages |
| Enterprise | Contact Sales | Custom Packages |
Source: Seamless.AI Pricing
Pricing Analysis
Seamless.AI offers the lower entry point ($0/mo vs $49/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Closely offers 4 pricing tiers compared to Seamless.AI's 3, giving you more granularity as you scale.
Seamless.AI includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- Multichannel campaigns across LinkedIn and email
- Conditional sequence builder
- Smart Inbox unifying LinkedIn and email replies
- LinkedIn account warmup
- Dedicated residential IP for each LinkedIn account
- OAuth Gmail and Outlook connection plus custom SMTP
- and 4 more listed below
- Real-time B2B contact search engine
- Email and cell phone lookups
- Pitch intelligence
- Data enrichment
- Buyer intent data (add-on)
- Job changes tracking (add-on)
- and 4 more listed below
Closely Key Features
- Multichannel campaigns across LinkedIn and email
- Conditional sequence builder
- Smart Inbox unifying LinkedIn and email replies
- LinkedIn account warmup
- Dedicated residential IP for each LinkedIn account
- OAuth Gmail and Outlook connection plus custom SMTP
- Email finder with a multi-step fallback process
- Phone number finder
- AI lead scoring and personalization agents
- Export from Sales Navigator, LinkedIn posts and events
Seamless.AI Key Features
- Real-time B2B contact search engine
- Email and cell phone lookups
- Pitch intelligence
- Data enrichment
- Buyer intent data (add-on)
- Job changes tracking (add-on)
- Autopilot list building (add-on)
- AI writing assistant
- Chrome extension
- Enterprise security and compliance
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 Closely
- Multichannel campaigns across LinkedIn and email
- Conditional sequence builder
- Smart Inbox unifying LinkedIn and email replies
- LinkedIn account warmup
- Dedicated residential IP for each LinkedIn account
- OAuth Gmail and Outlook connection plus custom SMTP
- Email finder with a multi-step fallback process
- Phone number finder
- AI lead scoring and personalization agents
- Export from Sales Navigator, LinkedIn posts and events
Listed only by Seamless.AI
- Real-time B2B contact search engine
- Email and cell phone lookups
- Pitch intelligence
- Data enrichment
- Buyer intent data (add-on)
- Job changes tracking (add-on)
- Autopilot list building (add-on)
- AI writing assistant
- Chrome extension
- Enterprise security and compliance
Integration Ecosystem
Closely Integrations
Closely connects with: Salesforce, Pipedrive, HubSpot, GoHighLevel, Gmail, Microsoft Outlook, SMTP, Webhooks.
Seamless.AI Integrations
Seamless.AI connects with: Salesforce, HubSpot, Outreach, SalesLoft, Pipedrive, Microsoft Dynamics 365, Zapier.
Shared Integrations
Both tools integrate with: Salesforce, Pipedrive, HubSpot.
Integrations listed only by Closely: GoHighLevel, Gmail, Microsoft Outlook, SMTP, Webhooks.
Integrations listed only by Seamless.AI: Outreach, SalesLoft, Microsoft Dynamics 365, Zapier.
Use Case Recommendations
Best Fit for Closely
- Budget-conscious teams looking for an affordable sales engagement platform
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for Seamless.AI
- 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 | Closely | Seamless.AI |
|---|---|---|
| Starting Price | $49/mo | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 10 | 10 |
| Integrations | 8 | 7 |
| Founded | N/A | 2015 |
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
Closely serves the multi-channel sales outreach and engagement tracking side of an outbound stack and Seamless.AI the B2B lead data and contact enrichment side. Seamless.AI offers a more accessible entry point, while Closely starts at $49/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 Closely and Seamless.AI for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Closely and Seamless.AI?
- Closely is a sales engagement platform focused on multichannel outreach and engagement tracking across LinkedIn and email, while Seamless.AI is a data enrichment tool focused on B2B lead data and contact enrichment. They address different parts of the sales workflow, so many teams use both together.
- Which tool is cheaper, Closely or Seamless.AI?
- Seamless.AI has the lower entry point with a free plan offering 50 credits, compared to Closely's Starter plan at $49/mo for 1 LinkedIn account and unlimited email accounts. Seamless.AI's paid Pro and Enterprise tiers require contacting sales for pricing.
- Does Closely offer a free plan like Seamless.AI?
- The article does not list a free plan for Closely; its entry tier is the Starter plan at $49/mo. Seamless.AI does offer a Free plan with 50 credits, making it the option with a no-cost starting point.
- What integrations do Closely and Seamless.AI share?
- Closely and Seamless.AI both integrate with Salesforce and Pipedrive. Beyond those shared connections, Closely also links to HubSpot, GoHighLevel, Gmail, Microsoft Outlook, SMTP, and Webhooks, while Seamless.AI adds Outreach, SalesLoft, Microsoft Dynamics 365, and Zapier.
- Should I use Closely or Seamless.AI for my sales team?
- If your priority is coordinating outreach across email, phone, and social channels, Closely is built for that with its multichannel campaigns and conditional sequence builder. If you need accurate contact data for target accounts, Seamless.AI's real-time contact search and lookups fit that need, and many teams run both.
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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