Success.ai vs TrulyInbox: Cold Email Platform vs Email Warmup Tool Comparison
Compare Success.ai (cold email platform) and TrulyInbox (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; TrulyInbox is an email warmup tool starting free, offering unlimited inbox connections on paid plans and customizable reply rates. Teams focused on sending campaigns should choose Success.ai, while those focused on deliverability and sender reputation should choose TrulyInbox, and some teams use both.
Key takeaways
- Success.ai's entry plan, Lite, costs $49/mo and includes 2,000 tokens per month plus 5K emails per month with warm-up on 10 accounts.
- TrulyInbox's Free plan costs $0/mo and includes 1 email account with 10 warmup emails per day.
- TrulyInbox offers 5 pricing tiers ranging from Free to $479/mo for its Scale Plus / Custom Plan, compared to Success.ai's 4 tiers.
- TrulyInbox lists a customizable reply rate per plan ranging from 10% to 65%.
- Success.ai's Pro plan costs $199/mo and includes 150K emails per month with advanced deliverability features.
Reviewed and updated September 2, 2026
Success.ai vs TrulyInbox: Cold Email Platform vs Email Warmup Tool Comparison
Success.ai is a cold email platform; TrulyInbox 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; TrulyInbox 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 TrulyInbox lists unlimited email account connections on all paid plans and customizable reply rate per plan (10% to 65%).
TrulyInbox offers a lower entry point at $0/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 TrulyInbox. 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.
TrulyInbox is Cost-effective email warmup platform that supports unlimited inbox connections on paid plans, with customizable reply rates, ramp-up schedules, and real-time deliverability scoring.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Lite
Free
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
TrulyInbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 1 email account | 10 warmup emails/day |
| Starter | $29/mo | 3 email inboxes | 200 warmup emails/day |
| Growth | $99/mo | 15 email inboxes | 1,000 warmup emails/day |
| Scale | $199/mo | unlimited accounts connectable | 3,000 warmup emails/day |
| Scale Plus / Custom Plan | $479/mo | unlimited accounts connectable | 5,000 warmup emails/day |
Source: TrulyInbox Pricing
Pricing Analysis
TrulyInbox offers the lower entry point ($0/mo vs $49/mo). Teams watching their budget will appreciate the savings, especially when starting out.
TrulyInbox offers 5 pricing tiers compared to Success.ai's 4, giving you more granularity as you scale.
TrulyInbox includes a free tier, which is helpful for evaluating the platform without upfront cost.
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
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- Real-time deliverability score tracking
- Multiple email open simulation for natural engagement
- 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
TrulyInbox Key Features
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- Real-time deliverability score tracking
- Multiple email open simulation for natural engagement
- Advanced warmup settings on higher plans
- Free forever plan with 1 inbox
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 TrulyInbox
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- Real-time deliverability score tracking
- Multiple email open simulation for natural engagement
- Advanced warmup settings on higher plans
- Free forever plan with 1 inbox
Integration Ecosystem
Success.ai Integrations
Success.ai connects with: Zapier, HubSpot, Salesforce, Pipedrive, Slack.
TrulyInbox Integrations
TrulyInbox connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, Yahoo Mail.
Integrations listed only by Success.ai: Zapier, HubSpot, Salesforce, Pipedrive, Slack.
Integrations listed only by TrulyInbox: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, Yahoo Mail.
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 TrulyInbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (7 integrations)
- Teams that want to start free and scale up as needs grow
Feature Comparison Summary
| Feature | Success.ai | TrulyInbox |
|---|---|---|
| Starting Price | $49/mo | Free |
| Top Tier Price | Contact Sales | $479/mo |
| Total Features Listed | 9 | 8 |
| Integrations | 5 | 7 |
| Founded | N/A | 2023 |
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 TrulyInbox the email domain warming and deliverability side. TrulyInbox offers a more accessible entry point, 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 TrulyInbox for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Success.ai and TrulyInbox?
- Success.ai is a cold email outreach platform, while TrulyInbox is an email warmup tool. Success.ai focuses on sending campaigns, AI reply operators, and a 700M+ contact database, while TrulyInbox focuses on building sender reputation and improving inbox placement through warmup and deliverability scoring.
- How much does Success.ai cost compared to TrulyInbox?
- Success.ai starts at $49/mo for its Lite plan, while TrulyInbox has a free entry tier at $0/mo. TrulyInbox's paid plans then range from $29/mo (Starter) to $479/mo (Scale Plus / Custom Plan), giving it a lower barrier to entry than Success.ai.
- Does TrulyInbox have a free plan?
- Yes, TrulyInbox offers a Free plan that includes 1 email account and 10 warmup emails per day. This lets teams evaluate the platform before committing to a paid tier, unlike Success.ai, which starts at $49/mo.
- Can I use Success.ai and TrulyInbox together?
- Yes, the article notes that many teams run one of each tool. Success.ai handles cold email outreach and campaign sending, while TrulyInbox handles domain warming and deliverability, so combining them covers both sides of the outreach workflow.
- What features does TrulyInbox offer that Success.ai does not list?
- TrulyInbox lists customizable reply rates per plan ranging from 10% to 65%, customizable email ramp-up schedules, human-like email interaction simulation, real-time deliverability score tracking, and multiple email open simulation, none of which appear on Success.ai's published feature list.
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
Connect on LinkedIn →Explore more.
Ready to scale your outreach?
We build GTM engines that book real meetings. See the receipts.
Related articles.
Growbots vs MailHeat: Cold Email Platform vs Email Warmup Tool Comparison
Compare Growbots (cold email platform) and MailHeat (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Enginy vs Success.ai: Sales Engagement Platform vs Cold Email Platform Comparison
Compare Enginy (sales engagement platform) and Success.ai (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
GetSales.io vs Yet Another Mail Merge: Sales Engagement Platform vs Cold Email Platform Comparison
Compare GetSales.io (sales engagement platform) and Yet Another Mail Merge (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Artisan vs Yet Another Mail Merge: Sales Engagement Platform vs Cold Email Platform Comparison
Compare Artisan (sales engagement platform) and Yet Another Mail Merge (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Hexospark vs JustCall: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Hexospark (cold email platform) and JustCall (sales engagement platform). See pricing, features, and integrations to decide which one, or both, your stack needs.
EmailBison vs Emelia: Cold Email Platform Comparison
Compare EmailBison and Emelia side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.