MailMerge365 vs Salesbot: Are You Even Comparing the Right Tools?
Here's the thing - this comparison doesn't make much sense. It's like comparing a stapler to a filing cabinet. MailMerge365 sends personalized emails from Outlook using contacts you already have. Salesbot finds contacts you don't have and runs automated outreach. They aren't competitors.
30-second verdict: MailMerge365 runs ~$120/year per mailbox for Outlook-native campaigns. Salesbot starts at $49/month for prospecting and sequences. Pick based on what's actually missing from your workflow, not which logo looks shinier.
What Is MailMerge365?
MailMerge365 is an Outlook add-in that turns your Microsoft 365 mailbox into a campaign sender. You upload a spreadsheet (XLS, XLSX, or CSV), map personalization tokens, and send from your own email address. It handles open/click tracking, bounce detection, unsubscribe management, and follow-ups targeted to non-responders.
The daily cap is 5,000 emails per mailbox - that's a Microsoft 365 limit, not MailMerge365's. Pricing runs approximately $120/year per mailbox on the annual plan, with pay-as-you-go credits also available. Free trial covers 100 recipients. Rated 4.3/5 on G2, though from only 2 reviews.
What Is Salesbot?
Salesbot is a B2B data and outreach platform with 650M+ leads, waterfall data sourcing, AI-powered search, and built-in drip campaigns. You define your ICP, it finds contacts, and you launch sequences without leaving the platform.
The Basic plan is $49/month for a single user and includes 12,000 verified email credits and 900 mobile credits per year. Professional jumps to $99/month per user for teams of two or more. Enterprise is custom. There's a 7-day free trial with no credit card required. Salesbot holds a 4.8/5 on G2 - but from only 3 reviews. Capterra lists it with zero reviews. Reddit threads about Salesbot exist but get minimal engagement, which tells you how new the tool still is.
MailMerge365 and Salesbot solve sending and prospecting - but neither fixes bad data. Prospeo's 5-step verification delivers 98% email accuracy across 143M+ verified contacts, refreshed every 7 days. Stack Optimize kept bounce rates under 3% at scale using this exact layer.
Stop debating tools and fix the data that feeds them.
Feature-by-Feature Comparison
| Feature | MailMerge365 | Salesbot | Prospeo |
|---|---|---|---|
| Type | Mail merge add-in | Data + outreach | Data platform |
| Pricing | ~$120/yr per mailbox | $49-99/mo per user | Free tier; ~$39/mo+ |
| Contact database | None | 650M+ leads | 300M+ verified profiles |
| Email sending | Yes (Outlook) | Yes (built-in) | No (pair with sequencers) |
| Daily send limit | 5,000/day | Unlimited on paid plans | N/A |
| Tracking | Opens + clicks | Opens + clicks | N/A |
| Integrations | Outlook (Windows/Mac/Web), Microsoft 365 | Salesforce, HubSpot, Outreach, Instantly, Clay | Salesforce, HubSpot, Clay, Lemlist, Smartlead |
| Free trial | 100 recipients | 7 days, no CC | 75 emails/mo |
| Email verification | No | Limited validation | 98% accuracy |
Putting these two tools in the same table almost feels misleading. MailMerge365 has no contact database. Salesbot has no Outlook-native sending. They solve different halves of the outbound problem.
When to Use Which
Use MailMerge365 if you already have a clean contact list and want to send personalized campaigns from Outlook. It's dead simple for teams that live in Microsoft 365 and don't need prospecting. Skip it if you need to find contacts - it doesn't do that at all.
Use Salesbot if you need to build prospect lists from scratch and run automated sequences. One reviewer reports sending roughly 200 cold emails daily in about 20 minutes, and customer support gets consistent praise. Skip it if you need tight CRM integration out of the box - reviewers call it "a hassle" - or if you need file attachments in drip campaigns, which Salesbot doesn't support.
The Missing Piece: Verified Contact Data
Neither tool solves the data quality problem well.
MailMerge365 doesn't find contacts at all. Salesbot finds them, but with only 3 reviews and zero independent validation of its database accuracy, you're trusting marketing claims. We've tested enough B2B databases to know that unverified lists typically bounce at 8-15%, and that kind of bounce rate destroys your sender reputation fast.
A verification step between prospecting and sending - export from Salesbot, verify, then send via MailMerge365 or any sequencer - prevents that damage entirely. Prospeo handles this with 98% email accuracy across 143M+ verified emails, refreshed every 7 days. Its 5-step verification process includes catch-all handling, spam-trap removal, and honeypot filtering, which is the kind of infrastructure that keeps bounce rates under 3% even at scale. Stack Optimize, for example, built to $1M ARR while maintaining client deliverability above 94% and bounce rates under 3% using this approach.
Salesbot claims 650M+ leads but has 3 reviews and zero independent accuracy validation. Prospeo's 300M+ profiles are 5-step verified with catch-all handling, spam-trap removal, and honeypot filtering - delivering 98% accuracy at roughly $0.01 per email.
Verify 75 emails free this month before your next campaign.
FAQ
Can I use MailMerge365 and Salesbot together?
Yes. Use Salesbot to build your prospect list, export to a spreadsheet, then send via MailMerge365 in Outlook. Run a verification step between export and send - unverified contacts tank deliverability. Prospeo's free tier handles 75 verifications per month at no cost, which is enough for small batches.
Is Salesbot's contact database accurate?
Salesbot cites a testimonial putting mobile accuracy around 90%, but with only 3 reviews total and no independent validation, there's no way to confirm at scale. Pull 50-100 contacts during the free trial and verify them before committing to a paid plan.
Final Recommendation
Let's be honest: most teams weighing MailMerge365 vs Salesbot don't need either tool yet. They need clean data first. We've seen teams waste months on the wrong tool because they framed the problem wrong - they thought they had a sending problem when they actually had a data problem.
If you need to send emails you've already got, MailMerge365 is ~$120/year per mailbox and it works. If you need to find contacts and automate outreach, Salesbot starts at $49/month. But if your lists bounce above 3%, neither tool will save you. Fix the data first.