7 Best Rebump Alternatives for Automated Follow-Ups in 2026
Rebump's top AI tier (Unlimited Premium) costs $44.99/month on monthly billing, or $35.99/month billed annually. One user on r/coldemail reported scaling to 200 mailboxes - that's $8,998/month just for follow-ups. And when every inbox fires the same follow-up wording on the same schedule, deliverability gets torched fast.
You're not the only one looking for rebump alternatives. The base plans ($5/mo and $12/mo) are cheap, and the tool holds a 4.9/5 on G2 - the frustration isn't Rebump itself, it's the AI tier pricing and Gmail lock-in. Here are seven options worth your time.
Our Picks (TL;DR)
- Cheapest direct replacement: Vocus.io - $5/mo, no per-inbox charges, 30-day free trial
- Best free option: Boomerang - 10 credits/mo free, 30-day Pro trial
- Best for scaling outreach: GMass - $29.95/mo, unlimited emails inside Gmail
- Fix your data first: Prospeo - free tier (75 verified emails/mo), 98% email accuracy
Quick Comparison
| Tool | Starting Price | Best For | Gmail | Outlook |
|---|---|---|---|---|
| Vocus.io | $5/mo | Direct replacement | ✅ | ❌ |
| Boomerang | Free (10/mo) | Light follow-ups | ✅ | ❌ |
| Prospeo | Free (75/mo) | Verifying emails before follow-ups | Any tool | Any tool |
| Right Inbox | Free (5/mo) | Follow-ups + CRM | ✅ | ❌ |
| GMass | $29.95/mo | High-volume campaigns | ✅ | ❌ |
| FollowUpThen | Free (50/mo) | Personal reminders | ✅ | ✅ |
| Mixmax | $89/user/mo | Full sales engagement | ✅ | - |
No follow-up tool fixes a 30% bounce rate. Prospeo verifies emails at 98% accuracy across 143M+ addresses - refreshed every 7 days, not every 6 weeks. Meritt dropped their bounce rate from 35% to under 4% and tripled pipeline to $300K/week.
Clean your list before you automate a single bump.
Best Rebump Alternatives in 2026
Vocus.io
Use this if you want the closest 1:1 replacement at a fraction of the cost. Skip this if you need Outlook support or run more than 500 active follow-ups.
Vocus.io is the obvious pick for anyone leaving Rebump. Pricing starts at $5/mo (Basic), $10/mo (Starter), or $20/mo (Professional), with a 30-day trial that doesn't require a credit card. The critical difference: Vocus doesn't charge per inbox. Basic includes 5 connected Gmail inboxes; Professional bumps that to 10.
You can personalize follow-up sequences per recipient - something Vocus's own comparison page against Rebump highlights as a gap in Rebump's workflow. Active follow-up caps (50/100/500 by tier) are the main constraint, but most individual users won't hit those limits. We've recommended this to teams running under 200 active threads and the feedback has been consistently positive.
If you want to improve the actual copy inside those sequences, start with these sales follow-up templates and adapt them to your offer.
Boomerang for Gmail
Boomerang's credit system is the first thing to understand. The free tier gives you 10 message credits per month - one credit per scheduled send or follow-up reminder. Paid plans run $4.98/mo (Personal) to $49.98/mo (Premium) on annual billing. New accounts get a free 30-day Pro trial.
If you only bump a handful of threads monthly, the free tier covers it. But if you're coming from Rebump's unlimited model, the credit math will frustrate you fast. Ten credits disappear in a morning.
Right Inbox
The feature list is dense for the price - sequences, mail merge, tracking, and CRM integration in a single Gmail extension at $7.95/mo yearly (Professional) or $16.95/mo (Team). Free tier caps you at 5 emails/month.
Here's the thing. Users consistently report tracking misses, Gmail interface glitches, and slow support response times. We've seen teams get burned when follow-ups get automatically canceled without explanation - no error message, no log, just silence. If reliability is your top priority, look elsewhere. If you can tolerate occasional quirks, the feature density is hard to match at this price.
If you're trying to connect follow-ups to your pipeline, it helps to connect your outreach tool to CRM so nothing falls through the cracks.
GMass
Use this if you need follow-ups at scale with mail merge and campaign analytics. Skip this if you just want to bump a few warm threads.
GMass is a mail-merge and cold-email platform that happens to include automated follow-ups - it's not a simple bump tool. It runs inside Gmail, users have collectively sent over 9 billion emails through it, and sequences are included at every tier. Standard now runs $29.95/mo ($249/year), Premium $39.95/mo, Professional $59.95/mo. Prices jumped roughly 20% in January 2026, so that's worth factoring in.
For teams running high-volume outbound, GMass is a workhorse. For someone who just needs gentle reminders on warm threads, it's overkill - like buying a pickup truck to commute three miles.
If you're worried about getting flagged as you scale, read up on email velocity and how it impacts deliverability.
FollowUpThen
FollowUpThen isn't an automated bump tool. It's an email-based reminder system. Forward a message to a time-based address (like 3days@followupthen.com) and it bounces back to you as a nudge. Free for up to 50 follow-ups/month, and the Base plan is $4/mo on annual billing or $5/mo monthly.
The one advantage over every other tool here: it works with any email client, including Outlook. Use it for personal task management, not for automating replies to recipients.
Mixmax
Full sales engagement platform at $89/user/mo on an annual contract. Sequences, meeting scheduling, inbox management - the works.
Let's be honest: if you just need automated bumps, you're paying $89/mo for features you won't touch. Only consider Mixmax if you've genuinely outgrown simple follow-up tools and need a complete sales workflow with Salesforce integration, analytics dashboards, and team-level sequence management. For everyone else, it's a waste of budget.
If you're evaluating other platforms in the same category, see these Mixmax alternatives before you commit.
Why Your Follow-Ups Aren't Working
Here's the hot take nobody in this space wants to hear: what users on r/coldemail actually want - follow-ups that read the thread and adapt to context - doesn't exist in any tool on this list yet. Every option above is still sending pre-written sequences on a timer. Until AI catches up to that vision, the best strategy is clean data plus simple automation.
And that's where most people get stuck. In our testing, the single biggest factor in follow-up reply rates isn't the tool - it's whether the email actually lands. If roughly 30% of your list is bouncing, no follow-up tool fixes that. The bottleneck isn't automation. It's data.
Prospeo verifies emails at 98% accuracy across 143M+ verified addresses, with a 7-day data refresh cycle while the industry average sits at six weeks. One customer, Meritt, saw their bounce rate drop from 35% to under 4% after switching their verification workflow - and their pipeline tripled from $100K to $300K per week. That's the difference between sequences that build pipeline and sequences that burn your domain.
If you want the deeper mechanics behind this, start with an email deliverability guide and then benchmark your email bounce rate.
The free tier gives you 75 verified emails per month, enough to clean a test list before you automate anything. Pair it with Vocus.io or any other tool on this list: they handle the bumps, Prospeo makes sure those bumps actually reach inboxes.
If you're building lists from multiple sources, consider adding data enrichment services so your targeting stays tight before you verify.
Switching from Rebump saves you money on follow-ups. But if 1 in 3 emails bounces, you're still burning your domain. Prospeo's free tier gives you 75 verified emails/month - enough to test any tool on this list with contacts that actually land.
Pair Prospeo with any follow-up tool and watch reply rates climb.
FAQ
Does Rebump work with Outlook?
No. Rebump is Gmail and Google Workspace only. FollowUpThen works via email forwarding with any client. None of the simple bump tools here support Outlook natively.
What's the cheapest Rebump alternative?
Boomerang and FollowUpThen both have free tiers. For a true direct replacement, Vocus.io starts at $5/mo with no per-inbox charges - matching Rebump's entry pricing while including multiple inbox support and per-recipient personalization.
Why are my follow-up emails bouncing instead of getting replies?
If your bounce rate is above 5%, the problem isn't your follow-up tool - it's your contact data. Verify your list before you automate anything. Clean data means higher deliverability, which means your bumps actually reach inboxes instead of spam folders.