Success.ai vs Warmforge: Cold Email Platform vs Email Warmup Tool Comparison
Compare Success.ai (cold email platform) and Warmforge (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Success.ai is a cold email outreach platform starting at $49/mo, offering AI sales and reply operators plus a 700M+ contact database with unlimited look-ups. Warmforge is an email warmup tool starting at $12/mo, focused on mailbox warming, Heat Score tracking, and DNS, MX, and blacklist health checks. Many teams use both together rather than choosing one.
Key takeaways
- Success.ai's entry plan is $49/mo (Lite), which includes 2,000 tokens per month and 5K emails per month with warm-up on 10 accounts.
- Warmforge's entry plan is $12/mo per slot, with 1 slot covering 1 mailbox and one free placement test per month included.
- Success.ai offers four pricing tiers (Lite, Starter, Pro, Enterprise) compared to Warmforge's three (Email Warm Up, Placement Tests Pro, Placement Tests Growth).
- Success.ai integrates with Zapier, HubSpot, Salesforce, Pipedrive, and Slack, while Warmforge integrates with Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge, and Mailforge.
- Warmforge tracks a per-mailbox Heat Score and performs health checks on DNS, MX records, and blacklist status.
Reviewed and updated September 2, 2026
Success.ai vs Warmforge: Cold Email Platform vs Email Warmup Tool Comparison
Success.ai is a cold email platform; Warmforge is an email warmup tool. Whether you need one, the other, or both depends on which part of the workflow you are buying for: cold email outreach on one side, email domain warming and deliverability on the other. This guide lays out what each vendor publishes.
The Quick Answer
Success.ai is a cold email platform for cold email outreach; Warmforge is an email warmup tool for email domain warming and deliverability. By each vendor's own wording, Success.ai lists ai sales & reply operators and 700m+ database with unlimited look-ups, and Warmforge lists email warm up and monitoring & health checks.
Warmforge offers a lower entry point at $12/mo compared to Success.ai at $49/mo.
If your priority is sending campaigns that land in the inbox and generate replies, Success.ai is the one built for it; for building sender reputation and improving inbox placement, that is Warmforge. Many teams run one of each.
Understanding the Core Difference
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.
Warmforge is Email warm up tool from the Forge Ecosystem that warms mailboxes with AI-written emails and tracks a per-mailbox Heat Score. Adds DNS, MX and blacklist health checks, placement tests and automatic removal of warm-up mail that lands in spam.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Lite
Email Warm Up (per slot)
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
Warmforge Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Email Warm Up (per slot) | $12/mo | 1 slot covers 1 mailbox; 1 free slot included | Automated AI email warm up; 1 free placement test per month |
| Placement Tests Pro Plan | $39/mo | 50 mailboxes per test | 100 tests per month |
| Placement Tests Growth Plan | $169/mo | 250 mailboxes per test | Unlimited tests |
Source: Warmforge Pricing
Pricing Analysis
Warmforge offers the lower entry point ($12/mo vs $49/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Success.ai offers 4 pricing tiers compared to Warmforge's 3, giving you more granularity as you scale.
Features Breakdown
- 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
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- and 2 more listed below
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
Warmforge Key Features
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- Health Checks on DNS and MX records and blacklist status
- Unique emails written by AI
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 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
Listed only by Warmforge
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- Health Checks on DNS and MX records and blacklist status
- Unique emails written by AI
Integration Ecosystem
Success.ai Integrations
Success.ai connects with: Zapier, HubSpot, Salesforce, Pipedrive, Slack.
Warmforge Integrations
Warmforge connects with: Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge (native), Mailforge (native).
Integrations listed only by Success.ai: Zapier, HubSpot, Salesforce, Pipedrive, Slack.
Integrations listed only by Warmforge: Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge (native), Mailforge (native).
Use Case Recommendations
Best Fit for Success.ai
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (9 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for Warmforge
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (6 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Feature Comparison Summary
| Feature | Success.ai | Warmforge |
|---|---|---|
| Starting Price | $49/mo | $12/mo |
| Top Tier Price | Contact Sales | $169/mo |
| Total Features Listed | 9 | 8 |
| Integrations | 5 | 6 |
| Founded | N/A | 2024 |
Getting Started Checklist
- Define your cold email outreach and email domain warming and deliverability requirements and monthly budget
- Estimate your expected email sending volume and warmup email 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
Success.ai serves the cold email outreach side of an outbound stack and Warmforge the email domain warming and deliverability side. Warmforge offers a more accessible entry point at $12/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 Success.ai and Warmforge for current information.
Frequently asked questions.
Frequently asked questions- What's the difference between Success.ai and Warmforge?
- Success.ai is a cold email outreach platform with AI sales and reply operators and a 700M+ contact database, while Warmforge is an email warmup tool that warms mailboxes with AI-written emails and tracks a per-mailbox Heat Score. They address different parts of the outreach workflow: sending campaigns versus building sender reputation.
- How much does Success.ai cost compared to Warmforge?
- Success.ai's entry plan, Lite, is $49/mo, while Warmforge's entry plan, Email Warm Up, is $12/mo per slot. Success.ai has four pricing tiers total (Lite, Starter, Pro, Enterprise), and Warmforge has three (Email Warm Up, Placement Tests Pro, Placement Tests Growth).
- Do I need both Success.ai and Warmforge?
- Many teams run both, according to the article, since Success.ai handles cold email outreach and campaign sending while Warmforge focuses on building sender reputation and improving inbox placement. If the priority is sending campaigns that generate replies, Success.ai fits; for deliverability and warmup, Warmforge fits.
- What integrations does each platform support?
- Success.ai connects with Zapier, HubSpot, Salesforce, Pipedrive, and Slack. Warmforge connects with Google Workspace, Microsoft 365, Gmail, Outlook, and its native tools Salesforge and Mailforge.
- What features does Warmforge offer that Success.ai doesn't list?
- Warmforge lists Email Warm Up, Monitoring & Health Checks, Placement Tests, Deliverability Boost, Always-On Warm Up, Heat Score per mailbox, DNS/MX/blacklist health checks, and unique AI-written emails. These are listed only under Warmforge's own feature list, based on exact wording from each vendor's page.
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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