Mailshake vs Overloop AI: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Mailshake (cold email platform) and Overloop AI (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Mailshake is a cold email platform starting at $29/mo with unlimited email warmup and campaigns, while Overloop AI is a sales engagement platform starting at $69/mo with a 450M+ prospect database and AI-powered multichannel campaigns. Mailshake fits budget-focused cold email outreach, Overloop AI fits teams needing prospecting plus multi-channel engagement tracking. Many teams run both.
Key takeaways
- Mailshake's entry plan costs $29/mo with unlimited uploaded contacts and 1,500 email sends per month, while Overloop AI's Starter plan costs $69/mo with 250 credits per user and 1 email account.
- Mailshake offers four pricing tiers (Starter, Email Outreach, Sales Engagement, Agency Plan) compared to Overloop AI's three (Starter, Growth, Enterprise).
- Overloop AI lists a 450M+ prospects database and an Email Finder & Verifier, features not listed by Mailshake.
- Mailshake lists a VOIP dialer with unlimited US/Canada calling and LinkedIn automation on its Sales Engagement+ plan, features not listed by Overloop AI.
- Both platforms integrate with Salesforce, Pipedrive, HubSpot, and Zapier, while Overloop AI additionally connects with Slack, Calendly, Gmail, and Outlook.
Reviewed and updated September 2, 2026
Mailshake vs Overloop AI: Cold Email Platform vs Sales Engagement Platform Comparison
Sales teams building an outbound stack often weigh Mailshake, a cold email platform for cold email outreach, against Overloop AI, a sales engagement platform for multi-channel sales outreach and engagement tracking. 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
Mailshake is a cold email platform for cold email outreach; Overloop AI is a sales engagement platform for multi-channel sales outreach and engagement tracking. By each vendor's own wording, Mailshake lists unlimited email warmup and unlimited campaigns, and Overloop AI lists ai-powered campaigns and 450m+ prospects database.
Mailshake offers a lower entry point at $29/mo compared to Overloop AI at $69/mo.
If your priority is sending campaigns that land in the inbox and generate replies, Mailshake is the one built for it; for coordinating outreach across email, phone, and social channels, that is Overloop AI. Many teams run one of each.
Understanding the Core Difference
Mailshake is Sales engagement platform with email outreach, VOIP dialer, and LinkedIn automation for sales teams.
Overloop AI is Sales prospecting platform that finds verified B2B contacts and runs personalized email and social outreach campaigns. Includes a 450M+ B2B contact database, an email finder and verifier, and AI-written campaigns and follow-ups.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Starter
Mailshake Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $29/mo | UNLIMITED uploaded contacts | 1,500 email sends per month |
| Email Outreach | $49/mo | UNLIMITED uploaded contacts | UNLIMITED email sends per month |
| Sales Engagement | $99/mo | UNLIMITED uploaded contacts | UNLIMITED email sends per month |
| Agency Plan | Contact Sales | UNLIMITED uploaded contacts | UNLIMITED email sends per month |
Source: Mailshake Pricing
Overloop AI Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $69/mo | 250 credits per month per user | 1 email account per user; 3 campaigns |
| Growth | $99/mo | 500 credits per month per user | 3 email accounts per user; 10 campaigns |
| Enterprise | Contact Sales | 1,000 credits per month per user | Unlimited email accounts; Unlimited campaigns |
Source: Overloop AI Pricing
Pricing Analysis
Mailshake is more affordable at the entry level ($29/mo vs $69/mo). For teams with tight budgets or those just getting started with cold email outreach and multi-channel sales outreach and engagement tracking, this price difference matters.
Mailshake offers 4 pricing tiers compared to Overloop AI's 3, giving you more granularity as you scale.
Features Breakdown
- Unlimited email warmup
- Unlimited campaigns
- Mail merge
- A/B testing
- AI email writing
- Email rotation
- and 4 more listed below
- AI-powered campaigns
- 450M+ prospects database
- Verified Email Addresses
- Smart multichannel campaigns (Email + social)
- AI-powered Outreach Followups
- Email Finder & Verifier
- and 4 more listed below
Mailshake Key Features
- Unlimited email warmup
- Unlimited campaigns
- Mail merge
- A/B testing
- AI email writing
- Email rotation
- Unified inbox
- LinkedIn automation (Sales Engagement+)
- VOIP dialer (US/Canada unlimited)
- Lead Catcher
Overloop AI Key Features
- AI-powered campaigns
- 450M+ prospects database
- Verified Email Addresses
- Smart multichannel campaigns (Email + social)
- AI-powered Outreach Followups
- Email Finder & Verifier
- Chrome Extension for LinkedIn
- Conversations Inbox
- Email Warmup
- REST API
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 Mailshake
- Unlimited email warmup
- Unlimited campaigns
- Mail merge
- A/B testing
- AI email writing
- Email rotation
- Unified inbox
- LinkedIn automation (Sales Engagement+)
- VOIP dialer (US/Canada unlimited)
- Lead Catcher
Listed only by Overloop AI
- AI-powered campaigns
- 450M+ prospects database
- Verified Email Addresses
- Smart multichannel campaigns (Email + social)
- AI-powered Outreach Followups
- Email Finder & Verifier
- Chrome Extension for LinkedIn
- Conversations Inbox
- Email Warmup
- REST API
Integration Ecosystem
Mailshake Integrations
Mailshake connects with: Salesforce, Pipedrive, HubSpot, Zapier.
Overloop AI Integrations
Overloop AI connects with: HubSpot, Salesforce, Pipedrive, Zapier, Slack, Calendly, Gmail, Outlook.
Shared Integrations
Both tools integrate with: Salesforce, Pipedrive, HubSpot, Zapier.
Integrations listed only by Overloop AI: Slack, Calendly, Gmail, Outlook.
Use Case Recommendations
Best Fit for Mailshake
- Budget-conscious teams looking for an affordable cold email platform
- Enterprise buyers who prefer custom pricing and dedicated support
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Best Fit for Overloop AI
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
- SDR teams running multi-channel outreach sequences
- Sales managers tracking team engagement metrics
Feature Comparison Summary
| Feature | Mailshake | Overloop AI |
|---|---|---|
| Starting Price | $29/mo | $69/mo |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 10 | 10 |
| Integrations | 4 | 8 |
| Founded | N/A | 2015 |
Getting Started Checklist
- Define your cold email outreach and multi-channel sales outreach and engagement tracking requirements and monthly budget
- Estimate your expected email sending volume and sequences and engagement actions 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
Mailshake serves the cold email outreach side of an outbound stack and Overloop AI the multi-channel sales outreach and engagement tracking side. Mailshake offers a more accessible entry point at $29/mo, while Overloop AI starts at $69/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 Mailshake and Overloop AI for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between Mailshake and Overloop AI?
- Mailshake is a cold email platform built for cold email outreach, while Overloop AI is a sales engagement platform built for multi-channel sales outreach and engagement tracking. Mailshake emphasizes email warmup, unlimited campaigns, and a VOIP dialer, whereas Overloop AI emphasizes a 450M+ prospect database and AI-powered multichannel campaigns across email and social.
- Which one is cheaper, Mailshake or Overloop AI?
- Mailshake is cheaper at the entry level, starting at $29/mo compared to Overloop AI's $69/mo starting price. Mailshake also offers four pricing tiers versus Overloop AI's three, giving more granularity as a team scales.
- Does Mailshake have a prospect database like Overloop AI?
- Based on each vendor's own feature listing, Overloop AI lists a 450M+ prospects database along with an Email Finder & Verifier, while Mailshake does not list a prospect database among its features. Mailshake instead focuses on email warmup, campaigns, mail merge, and AI email writing.
- Can Mailshake and Overloop AI integrate with the same tools?
- Yes, both tools integrate with Salesforce, Pipedrive, HubSpot, and Zapier. Overloop AI also connects with additional tools not listed for Mailshake, including Slack, Calendly, Gmail, and Outlook.
- Should I use both Mailshake and Overloop AI together?
- The article notes that many teams run one of each, since Mailshake is built for landing campaigns in the inbox and generating replies, while Overloop AI is built for coordinating outreach across email, phone, and social channels. The best fit depends on whether the priority is cold email volume or multi-channel engagement tracking.
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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