ContactOut vs SecureMailMerge: Different Tools, Different Jobs
Comparing ContactOut and SecureMailMerge is like comparing a fishing rod to a frying pan. One finds contacts. The other sends emails through Outlook. They don't compete - they solve different problems entirely. If you're weighing these two, you probably need a workflow that handles both: find contacts AND send emails.
The 30-second verdict:
- Use ContactOut if you need prospect emails and phone numbers from professional profiles.
- Use SecureMailMerge if you need to send personalized emails through Outlook without data leaving your environment.
What Is ContactOut?
ContactOut is a Chrome extension and search portal that pulls emails and phone numbers from professional profiles. There's a free tier, but it's barely functional - 40 emails per year. ContactOut's own pricing page now just says "Talk to us," which tells you something about where they're headed. Third-party sources peg the Sales plan at $79/user/month and the Recruiter plan at $199/user/month.
Here's the thing: G2's pricing table lists annual quotas like 6,000-12,000 emails/year depending on plan, but ContactOut also markets "unlimited" email lookups on paid plans. G2 reviewers consistently flag a fair-use cap around 2,000 emails per month. We've seen this pattern across multiple reviews. One called it "deceptive credit practices". Another bluntly said "do not buy... you'll get only 2,000 emails... use Apollo or ZoomInfo." The tool carries a 4.4/5 on G2 across 109 reviews, but the pricing complaints are loud and specific.
Use it if you're a recruiter who needs phone numbers alongside emails and won't hit 2,000 lookups a month. Skip it if you need high-volume prospecting or you can't stomach hidden caps on "unlimited" plans.
What Is SecureMailMerge?
Your data never leaves Outlook. That's the entire pitch - and for HR teams, lawyers, and doctors handling confidential information, it's the only pitch that matters.
SecureMailMerge is an Outlook add-in for Microsoft 365 (Windows, macOS, and Web) that sends personalized bulk emails with individual attachments, variable CC/BCC, and placeholder fields directly from your inbox. Unlike ESPs that route through third-party servers, everything sends from your own Outlook account. It requires a Microsoft 365 Business subscription. Outlook users on Reddit frequently ask for exactly this setup: variable CC, individual attachments, and zero data leaving the org.
It doesn't find contacts. It doesn't track opens or clicks. That's by design, and it carries a 4.9-star rating on Microsoft AppSource.
Pricing is refreshingly simple: free for non-commercial use (with a promotional footer), $15/user/month for commercial use. No campaign limits, no attachment limits. The only sending cap is Microsoft 365's own 10,000 emails per 24 hours.
ContactOut costs $79+/mo and caps you at ~2,000 emails. Prospeo gives you 300M+ profiles with 98% email accuracy, 30+ search filters, and a 7-day data refresh cycle - all starting at roughly $0.01 per email. Export a clean CSV, drop it into SecureMailMerge, and send with confidence for under $65/month total.
Replace ContactOut's hidden caps with transparent, verified data.
Side-by-Side Comparison
| ContactOut | SecureMailMerge | |
|---|---|---|
| Purpose | Find emails & phones | Send via Outlook |
| Pricing | $79-$199/mo | Free / $15/mo |
| Finds contacts? | Yes | No |
| Sends emails? | No | Yes |
| Tracking | N/A | No (by design) |
| Privacy | Cloud-based | Local processing only |
| Platform | Chrome extension | Outlook add-in for Microsoft 365 |
| Best for | Recruiters, sales | Privacy-conscious bulk sends |
Let's be honest: if your average deal size is under five figures, ContactOut's $79-$199/month price tag probably doesn't pencil out - especially with that hidden 2,000-email cap eating into your ROI. You're better off with a cheaper data source and a dedicated sending tool.
Which One Do You Actually Need?
Nobody else compares these tools because they don't compete. The real question is which workflow gets you from prospect list to sent email fastest.
You need to send through Outlook. SecureMailMerge is the clear pick. $15/month, no data leaves your environment, attachments and variable CC/BCC handled natively. Nothing else comes close for privacy-first Outlook sending.
You need both. This is where it gets interesting. We've tested this workflow ourselves: export a verified CSV from Prospeo's database, upload it to SecureMailMerge's Excel workflow, and you're sending in under two minutes. Total cost: under $65/month. ContactOut alone costs $79+ and doesn't send a single email.
The Missing Piece: Verified Data
Neither tool independently verifies email addresses before you hit send. ContactOut finds contacts but has accuracy concerns and hidden caps. SecureMailMerge sends beautifully but needs you to bring your own list.
If you want to go deeper on list quality and cleanup, start with data enrichment services and a dedicated email deliverability guide before you scale volume.
If that list bounces, your domain reputation takes the hit. Cold emails can hit 60% open rates - but only if they reach real inboxes. A list full of dead addresses tanks your sender score fast, and recovering from that is a months-long headache we wouldn't wish on anyone.
That’s also why teams track email bounce rate and manage email velocity when sending at scale.
That's the gap a verified data source fills. Prospeo's 5-step verification - catch-all handling, spam-trap removal, and honeypot filtering - means the CSV you export is clean before it ever touches Outlook. Export, upload to SecureMailMerge, send with confidence. One of our customers, Stack Optimize, maintains 94%+ deliverability and under 3% bounce rates across all their client campaigns using this kind of workflow.
If you’re building outbound from scratch, pair this with proven sales prospecting techniques and a repeatable lead generation workflow.
Bad data kills domain reputation - and SecureMailMerge won't save you from bounces. Prospeo's 5-step verification catches spam traps, honeypots, and catch-all domains before you hit send. Stack Optimize runs 94%+ deliverability and under 3% bounce rates across every client campaign.
Export bounce-proof CSVs straight into your Outlook workflow.
FAQ
Can ContactOut and SecureMailMerge replace each other?
No. They solve completely different problems. ContactOut finds contact data from professional profiles; SecureMailMerge sends personalized emails through Outlook. You can use them together by pulling contacts from a data tool, then sending via SecureMailMerge.
Does SecureMailMerge have a daily sending limit?
SecureMailMerge itself has no limit. The only cap is Microsoft 365's 10,000 emails per 24 hours. For most teams running personalized outreach, that ceiling is more than enough.
What's the cheapest way to find verified emails for Outlook mail merge?
Prospeo's free tier gives you 75 verified emails per month at no cost, and paid plans run roughly $0.01 per email with 98% accuracy. Export to CSV, upload into SecureMailMerge - total cost under $65/month for both tools combined, less than ContactOut's entry-level plan.
Is there a free ContactOut alternative with better accuracy?
Prospeo offers 75 free verified emails per month plus 100 Chrome extension credits - no credit card required. With 143M+ verified emails and a 7-day data refresh cycle, it consistently outperforms ContactOut on accuracy while costing a fraction of the price on paid plans.