Mailshake vs Success.ai: Cold Email Platform Comparison
Compare Mailshake and Success.ai side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Mailshake starts at $29/mo and Success.ai starts at $49/mo, making Mailshake the more affordable entry point. Mailshake is a sales engagement platform with email outreach, a VOIP dialer, and LinkedIn automation, while Success.ai is a cold email platform built around a 700M+ contact database, AI sales operators, and unlimited warmup. The best choice depends on budget and needed features.
Key takeaways
- Mailshake's Starter plan costs $29/mo and includes unlimited uploaded contacts with 1,500 email sends per month.
- Success.ai's Lite plan costs $49/mo and includes 2,000 tokens per month for reveals, enrichment, and AI, plus 5K emails per month with warmup on 10 accounts.
- Mailshake lists 10 features including a VOIP dialer with unlimited US/Canada calling and LinkedIn automation on Sales Engagement plans and above.
- Success.ai lists a 700M+ contact database with unlimited look-ups and AI sales and reply operators as core features.
- Both platforms integrate with Salesforce, Pipedrive, HubSpot, and Zapier, while Success.ai additionally integrates with Slack.
Reviewed and updated September 2, 2026
Mailshake vs Success.ai: Cold Email Platform Comparison
Finding the right cold email platform can directly impact your revenue pipeline. Mailshake and Success.ai both aim to solve the same core problem (sending campaigns that land in the inbox and generate replies), yet they approach it differently. Let's break down the specifics.
The Quick Answer
By each vendor's own wording, Mailshake lists unlimited email warmup and unlimited campaigns, while Success.ai lists ai sales & reply operators and 700m+ database with unlimited look-ups. A capability both offer can appear under different names, so read both feature lists below.
Mailshake offers a lower entry point at $29/mo compared to Success.ai at $49/mo.
If your priority is sending campaigns that land in the inbox and generate replies, both tools target it. The right choice depends on your budget, team size, and the specific capabilities you need most.
Understanding the Core Difference
Mailshake is Sales engagement platform with email outreach, VOIP dialer, and LinkedIn automation for sales teams.
Success.ai is Cold email outreach platform with unlimited email sending accounts, unlimited warmup, a unified inbox and a 700M+ contact B2B database. AI operators write campaigns and draft replies, and a token balance meters data reveals, enrichment and AI actions.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Lite
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
Success.ai Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Lite | $49/mo | 2,000 tokens /mo for reveals, enrichment & AI; 700M+ database with unlimited look-ups | 5K emails /mo with warm-up on 10 accounts |
| Starter | $99/mo | 6,000 tokens /mo for reveals, enrichment & AI; 700M+ database with unlimited look-ups | 50K emails /mo with unlimited warm-up |
| Pro | $199/mo | 10,000 tokens /mo + advanced search filters | 150K emails /mo + advanced deliverability |
| Enterprise | Contact Sales | Custom tokens & unlimited email sending | Custom tokens & unlimited email sending |
Source: Success.ai Pricing
Pricing Analysis
Mailshake is more affordable at the entry level ($29/mo vs $49/mo). For teams with tight budgets or those just getting started with cold email outreach, this price difference matters.
Features Breakdown
- Unlimited email warmup
- Unlimited campaigns
- Mail merge
- A/B testing
- AI email writing
- Email rotation
- and 4 more listed below
- AI Sales & Reply Operators
- 700M+ database with unlimited look-ups
- Unified InboxHub
- Data enrichment & email verification built in
- unlimited warm-up
- advanced search filters
- and 3 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
Success.ai Key Features
- AI Sales & Reply Operators
- 700M+ database with unlimited look-ups
- Unified InboxHub
- Data enrichment & email verification built in
- unlimited warm-up
- advanced search filters
- advanced deliverability
- Website Visitor identification
- 5 deal pipelines
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 Success.ai
- AI Sales & Reply Operators
- 700M+ database with unlimited look-ups
- Unified InboxHub
- Data enrichment & email verification built in
- unlimited warm-up
- advanced search filters
- advanced deliverability
- Website Visitor identification
- 5 deal pipelines
Integration Ecosystem
Mailshake Integrations
Mailshake connects with: Salesforce, Pipedrive, HubSpot, Zapier.
Success.ai Integrations
Success.ai connects with: Zapier, HubSpot, Salesforce, Pipedrive, Slack.
Shared Integrations
Both tools integrate with: Salesforce, Pipedrive, HubSpot, Zapier.
Integrations listed only by Success.ai: Slack.
Use Case Recommendations
Best Fit for Mailshake
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for Success.ai
- Budget-conscious teams looking for an affordable cold email platform
- Organizations with complex tech stacks needing broad integration support (5 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Mailshake | Success.ai |
|---|---|---|
| Starting Price | $29/mo | $49/mo |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 10 | 9 |
| Integrations | 4 | 5 |
Getting Started Checklist
- Define your cold email outreach requirements and monthly budget
- Estimate your expected email sending volume 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 and Success.ai both serve the cold email outreach market. Mailshake offers a more accessible entry point at $29/mo, while Success.ai 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 Mailshake and Success.ai for current information.
Frequently asked questions.
Frequently asked questions- What is the price difference between Mailshake and Success.ai?
- Mailshake's entry plan costs $29/mo while Success.ai's entry plan costs $49/mo. Mailshake's Starter plan offers unlimited uploaded contacts with 1,500 email sends per month, while Success.ai's Lite plan offers 2,000 tokens per month for reveals, enrichment, and AI actions plus 5K emails per month with warmup on 10 accounts.
- What is the main difference between Mailshake and Success.ai?
- Mailshake is a sales engagement platform offering email outreach, a VOIP dialer, and LinkedIn automation for sales teams. Success.ai is a cold email outreach platform centered on unlimited sending accounts, unlimited warmup, a unified inbox, and a 700M+ contact B2B database, with AI operators writing campaigns and drafting replies.
- Does Mailshake include a VOIP dialer?
- Yes, Mailshake lists a VOIP dialer with unlimited calling to the US and Canada as one of its key features, available on the Sales Engagement plan and above. This is listed only by Mailshake and not by Success.ai in the article's feature comparison.
- Which integrations do Mailshake and Success.ai share?
- Mailshake and Success.ai both integrate with Salesforce, Pipedrive, HubSpot, and Zapier. Success.ai also integrates with Slack, which is listed only by Success.ai and not by Mailshake.
- Which platform is better for budget-conscious teams?
- The article recommends both platforms for budget-conscious teams looking for an affordable cold email platform. However, Mailshake has a lower entry price at $29/mo compared to Success.ai's $49/mo, which the article notes matters for teams with tight budgets.
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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