5 Right Inbox Alternatives That Actually Work in 2026
Five tracked emails per month. Pop-up ads nagging you to upgrade. Formatting that breaks the second you paste a template. If you've been putting up with Right Inbox's tracking misses, scheduling glitches, and a mail merge feature that reviewers consistently call unreliable, you're not alone - the consensus on r/coldoutreach threads is pretty clear that it's time to move on. Here's what's actually worth switching to.
Our Picks (TL;DR)
| Tool | Best For | Starting Price | Free Tier? |
|---|---|---|---|
| Boomerang | Scheduling & reminders | $4.98/mo | Yes (10 credits/mo) |
| GMass | Mail merge & bulk sends | $29.95/mo | No (free trial) |
| Prospeo | B2B email finding & verification | ~$0.01/email | Yes (75 emails/mo) |
| Gmelius | Team shared inbox | $19/user/mo (yearly) | No (7-day trial) |
| Mailbutler | Gmail + Outlook + Apple Mail | $4/user/mo (yearly) | Yes (with watermark) |
| Mixmax | Full sales engagement | $89/user/mo | Yes (Free plan after trial) |
One thing to keep in mind across all of these: no email tracking extension is fully accurate anymore. Apple Mail Privacy Protection preloads tracking pixels, inflating open rates across the board. Click and reply tracking still work fine - focus there.
Every Right Inbox alternative on this list sends emails - none of them verify whether those addresses are real. Prospeo's 5-step verification delivers 98% email accuracy, keeping your bounce rate under 3% so your new tool actually works.
Fix your data before you fix your sending tool.
Best Right Inbox Alternatives Compared
Boomerang for Gmail - Scheduling & Reminders
G2 ranks Boomerang the top alternative to Right Inbox, and in our testing, the scheduling was the most reliable of the bunch. If your main use case is send-later and follow-up reminders, Boomerang nails it without the drama.
Use this if you need reliable send-later, response tracking, and inbox pause - the core features Right Inbox promises but delivers inconsistently.
Skip this if you need mail merge or bulk sending. Boomerang is a single-email productivity tool, not an outreach platform.
The free tier gives you 10 message credits per month - double Right Inbox's free allowance, though you'll still hit the wall fast. Paid plans run from $4.98/mo (Personal) to $49.98/mo (Premium) on annual billing. One gotcha: the Personal plan only works with @gmail.com addresses, so Google Workspace users need Pro or higher. Every new account gets a 30-day Pro trial, no credit card required.
GMass - Mail Merge & Bulk Sends
GMass is the tool Right Inbox wishes its mail merge feature was. If you're sending personalized bulk emails from Gmail - campaigns, newsletters, cold outreach - GMass handles it with a level of deliverability control Right Inbox can't touch.
Use this if you're running mail merge campaigns, automated follow-up sequences, or anything involving more than a handful of emails at once. (If you need copy ideas, start with these follow-up sequences.)
Skip this if you just want scheduling and reminders. GMass is built for volume, and the pricing reflects that.
Here's the thing: GMass raised prices in January 2026. Standard jumped from $25 to $29.95/mo, Premium from $35 to $39.95/mo, Professional from $55 to $59.95/mo. Annual billing softens the blow - Standard drops to about $20/mo yearly. Team pricing scales from $35/user at 5 seats down to $22/user at 100. Still cheaper than most sales engagement platforms, and the deliverability features alone justify the cost if you're sending at any real volume.
Prospeo - Email Finding & Verification
Most people skip the step that matters most: making sure the emails they're sending to actually exist. Your Gmail extension can have perfect scheduling and beautiful tracking, but if 15% of your list bounces, your domain reputation tanks and every tool starts looking broken. (If you want the benchmarks and fixes, see our guide on email bounce rate.)
Prospeo fixes this at the root. With 300M+ professional profiles and 143M+ verified emails at 98% accuracy, it's a full B2B data platform - not just a verification add-on. The Chrome extension (40,000+ users) finds and verifies email addresses in one click from any website or CRM. Need to build a list from scratch? The database has 30+ search filters including buyer intent and technographics. Need to clean an existing list? Bulk verification catches invalid addresses before they damage your sender reputation.
We've seen the results firsthand: Stack Optimize used Prospeo to maintain 94%+ deliverability and sub-3% bounce rates across every client - with zero domain flags. The free tier gives you 75 email verifications per month, paid plans start at roughly $0.01 per email, and there are no contracts or sales calls required. (If you're comparing verifiers, start with these Bouncer alternatives.)
Gmelius - Team Collaboration
Gmelius only makes sense if your team shares an inbox - support@, sales@, info@ - and needs to assign, track, and collaborate on threads inside Gmail. Solo users should look elsewhere.
The pricing catch most reviews skip: all team members must be on the same plan. No mixing tiers. The $19/user/mo Meli plan (yearly billing) caps at 5 users and 5,000 conversations per month. Growth bumps that to 50 users and 10,000 conversations at $25/user/mo yearly. Pro runs $40/user/mo. There's a 7-day free trial that gives you access to Growth, but your account gets suspended if you don't convert - plan your evaluation window carefully.
Mailbutler - Multi-Client Support
Mailbutler is the only tool on this list that covers Gmail, Outlook, and Apple Mail. If you aren't exclusively in Gmail, it's the obvious pick. If you are Gmail-only, Boomerang or GMass will serve you better for scheduling or mail merge respectively.
Pricing starts at just $4/user/mo yearly for Starter. The Professional tier at $7/user/mo unlocks the features most people actually need - email tracking, scheduling, tasks, and notes. A free-forever option exists, but your emails get a visible Mailbutler watermark, which kills professional credibility. The 14-day trial includes all features, no credit card required.
Mixmax - Sales Engagement (If You Need It)
At $89/user/mo on annual billing, Mixmax is overkill if you're coming from an $8/mo Gmail add-on. Unless you need multi-step sequences with Salesforce integration, Mixmax is solving a different problem than Right Inbox ever tried to. We'd only recommend it for teams already running a structured sales process who've outgrown simpler tools. (If you're evaluating options, see our full list of Mixmax alternatives.)
Which Alternative Should You Pick?
Let's be honest: most people leaving Right Inbox don't need a bigger tool - they need a more reliable one. If you're closing deals under $15k and working solo, Boomerang at $4.98/mo covers 90% of what you actually used Right Inbox for. That's it.
For everyone else:
- Just need scheduling and reminders - Boomerang
- Need mail merge or bulk campaigns - GMass (pair it with a deliverability guide if you're scaling volume)
- Running a team with shared inboxes - Gmelius
- Use Outlook or Apple Mail alongside Gmail - Mailbutler
- Need a full sales engagement suite - Mixmax
One scenario we see constantly: someone switches from Right Inbox to GMass, starts sending bigger campaigns, and watches their bounce rate climb because they never cleaned their list. The tool isn't the problem - the data is. Pair your sending tool with a verification step and you'll save yourself weeks of deliverability headaches.
Switching from Right Inbox to GMass or Boomerang? Smart move. But bigger campaigns mean more bounces if your list is dirty. Prospeo verifies 143M+ emails at $0.01 each - no contracts, no sales calls. Stack Optimize used it to hit 94%+ deliverability with zero domain flags.
Clean your list first. Send with confidence after.
FAQ
Is Right Inbox free?
Technically. The free plan caps you at 5 tracked emails per month with constant pop-up ads. The paid Personal plan runs $7.95/mo on annual billing, which removes ads but doesn't fix the tracking reliability issues that drive most people to look for alternatives.
Does email tracking still work with Apple Mail?
Open tracking is inflated by Apple Mail Privacy Protection across every extension, not just Right Inbox. Click tracking and reply tracking remain reliable - focus on those metrics instead.
Can I verify emails before sending from Gmail?
Yes. Prospeo's Chrome extension verifies emails in one click - 75 free verifications per month, 98% accuracy. It works alongside any Gmail scheduling or mail merge extension on this list, so you don't have to choose between them.