Software Comparison
Best Boomerang for Gmail Alternatives (2026): 7 Tools Compared
Published June 21, 2026 · ~11 minute read
Short version: Boomerang is a polished send-scheduling and reminders tool, but its paid tiers run from $4.98 to $49.98/month and it doesn't find cold threads or write follow-ups for you. The best alternative depends on your job: Thread Pilot for auto-drafted follow-ups on threads you forgot, Right Inbox for a cheaper scheduling analog, Mixmax/GMass for automated outbound, and Gmail's native Nudges + Schedule Send if you just need the basics for free.
Boomerang for Gmail is a category veteran, installed by millions, and genuinely good at what it does: scheduling messages to send later, bringing threads back with reminders, read receipts, click tracking, Inbox Pause, and its Respondable writing-feedback assistant. But it isn't the right fit for everyone — some teams want a lower price, some want the follow-up actually written for them, and some only use one Boomerang feature and resent paying for the suite.
This guide compares seven real Boomerang alternatives in 2026 on the criteria that matter: price, whether it finds cold threads for you, whether it drafts the follow-up, and whether you stay in control of what sends. We lead with Thread Pilot because it owns a job Boomerang doesn't do at all — but we're honest about where Boomerang and the others win.
In this guide
Why people look for a Boomerang alternative
Boomerang earns its reputation. The reasons people shop around tend to cluster:
Price
Unlimited use starts at $4.98/month (Personal, @gmail.com only). Most Workspace users' first real tier is Pro at $14.98/month, and Premium reaches $49.98/month.
It reminds; it doesn't write
Boomerang Reminders resurface a thread, and Respondable critiques a draft you're writing, but neither composes the follow-up for you.
Per-message, not inbox-wide
You must set a reminder on each message at send time. The deal you forgot to flag is the one that still goes cold.
Paying for a suite you partly use
If you only need send-later, or only need follow-ups, a focused (often cheaper) tool can do that one job better.
The biggest gap in Boomerang's model isn't a missing feature — it's that it waits for you to act at send time. If your follow-ups slip precisely because you forget to set the reminder, you need a tool that works retroactively.
What to look for in a Boomerang alternative
- 1.Does it find cold threads for you? Per-message reminders only protect what you remembered to flag. Retroactive scanning catches the threads you forgot.
- 2.Does it draft the follow-up? A reminder still leaves you a blank page. Auto-drafting removes the writing tax.
- 3.Auto-send or review-before-send? Sequences and send-later dispatch mail automatically. Draft-only keeps a human in the loop on every message.
- 4.Price and plan fit. Check whether the useful tier works on Google Workspace addresses, and what it actually costs per month.
- 5.Scope. Do you want one focused job done well, or a broad outreach platform? Both exist on this list.
The 7 best Boomerang alternatives in 2026
1. Thread Pilot — Best for auto-drafted follow-ups on forgotten threads
Thread Pilot attacks the exact gap in Boomerang's model. Instead of asking you to set a reminder on each message, it runs on a schedule (and on demand with “Run Now”), scans your inbox over a lookback window you choose, finds every thread where you sent the last message and got no reply, and uses GPT-4 to draft a contextual follow-up in your voice. The drafts land in Gmail under a “DraftsToReview” label.
Crucially, it never auto-sends — you review, edit, and send each draft yourself. It filters out spam, trash, newsletters, and self-emails so only real conversations surface. At $3.99/month (Basic) and $8.99/month (Advanced, which adds custom templates, priority processing, and multiple Gmail accounts), it's a fraction of Boomerang's paid tiers, with a 14-day free trial and no credit card.
See the head-to-head in our Thread Pilot vs Boomerang breakdown.
2. Mailmeteor — Best for simple, privacy-friendly mail merge
Mailmeteor is a popular mail-merge tool for Gmail and Google Sheets, known for a clean interface, strong deliverability, and a privacy-first stance. It sends personalized campaigns from a spreadsheet, schedules sends, and offers automated follow-ups within a campaign.
Where it differs: Mailmeteor is built around outbound campaigns from a list, not recovering one-off cold threads in your inbox. Its follow-ups are sequence-style auto-sends tied to a merge, not contextual drafts for an individual thread.
3. Right Inbox — Closest like-for-like for scheduling + reminders
Right Inbox is the most direct Boomerang analog: send later, recurring emails, reminders if no reply, email tracking, sequences, templates, and notes — often at a friendlier price. If you want Boomerang's feature shape with a different vendor, this is the closest match.
Where it differs: like Boomerang, its reminders are per-message and it doesn't compose a contextual follow-up for you. Its sequences can auto-send.
4. Mixmax — Best for sales teams running outbound sequences
Mixmax is a full sales-engagement platform: automated multi-step sequences, CRM sync, calendar booking, polls, templates, and analytics. For revenue teams running outbound at scale, it's a serious tool well beyond Boomerang's scope.
Where it differs: sequences auto-send on a schedule, and pricing is team-scale (commonly ~$29–$65+/user/month). It's overkill if you just forget to follow up on individual threads. See our Thread Pilot vs Mixmax comparison.
5. GMass — Best for mass mail merge from Gmail
GMass turns Gmail into a mass-emailing and cold-outreach machine: large mail merges from Google Sheets, automated follow-up sequences, scheduling, and reporting, sent through your own Gmail. It's a favorite for high-volume senders.
Where it differs: it's an outbound-campaign tool with auto-sending sequences, not an inbox assistant that finds cold one-off threads and drafts a tailored reply.
6. FollowUpThen — Best lightweight, no-install reminders
FollowUpThen is elegantly simple: you BCC or forward to an address like 3days@followupthen.com and it brings the thread back to your inbox then. No install, works in any email client, with a usable free tier.
Where it differs: it's pure reminder scheduling — it surfaces the thread but never finds cold threads automatically or writes the follow-up.
7. cloudHQ Auto Follow Up — Best if you already use cloudHQ
cloudHQ offers an “Auto Follow Up” (and a related “Did I Reply?”) Gmail tool that sends scheduled follow-ups until you get a reply, part of cloudHQ's broad suite of Gmail add-ons. Convenient if you're already in the cloudHQ ecosystem.
Where it differs: follow-ups are pre-written sequences that auto-send on a schedule, not contextual drafts composed per thread for your review.
Boomerang alternatives: side-by-side
| Tool | Finds cold threads | Drafts follow-up | Review before send | Send later | Starting paid price |
|---|---|---|---|---|---|
| Thread Pilot | Yes (auto) | Yes (GPT-4) | Always (drafts only) | No | $3.99/mo |
| Boomerang | No (per-message) | No (feedback only) | Send Later auto-sends | Yes | $4.98–$49.98/mo |
| Mailmeteor | No | Sequence merges | Campaigns auto-send | Yes | ~$9.99/mo |
| Right Inbox | No (per-message) | No | Sequences auto-send | Yes | ~$7.95/mo |
| Mixmax | No | Templates / AI assist | Sequences auto-send | Yes | ~$29/user/mo |
| GMass | No | Sequence merges | Campaigns auto-send | Yes | ~$25/mo |
| FollowUpThen | No (per-message) | No | Reminder only | Reminders | Free / ~$5/mo |
Cells describe each tool's posture, not a pass/fail score. Pricing changes — verify current numbers with each vendor before deciding.
Which Boomerang alternative should you choose?
You forget to follow up and want it drafted for you
Choose Thread Pilot. It finds the cold threads automatically and writes the follow-up for your review — the one job Boomerang doesn't do — at a fraction of the price.
You mainly want cheaper send-later + reminders
Choose Right Inbox (closest Boomerang analog) or use Gmail's native Schedule Send + Nudges for free.
You run outbound sales at volume
Choose Mixmax or GMass for automated sequences and mail merge — with the understanding that they auto-send.
You want the simplest free reminders
Choose FollowUpThen (email a reminder address) or Gmail Nudges. No install, no commitment.
The Boomerang feature Boomerang doesn't have
Thread Pilot finds the threads you forgot and drafts every follow-up for your review — never auto-sent. From $3.99/month, 14-day free trial, no credit card.
Frequently asked questions
What is the best free Boomerang for Gmail alternative?
If you mean genuinely free forever, Gmail's own Nudges (built in, no install) is the zero-cost option for passive follow-up reminders, and FollowUpThen has a usable free tier for reminder-by-email scheduling. If you want the follow-up actually written for you, Thread Pilot isn't free but offers a 14-day free trial with no credit card and then starts at $3.99/month — far below Boomerang's paid tiers. The right answer depends on whether you need reminders (free options exist) or auto-drafted follow-ups (Thread Pilot).
Why do people switch away from Boomerang?
The most common reasons are price and scope. Boomerang's unlimited tiers start at $4.98/month for @gmail.com addresses only, and the first tier most Google Workspace users can actually use (Pro, with read receipts and tracking) is $14.98/month, with Premium at $49.98/month. Boomerang is also send-scheduling-centric: it reminds you per message and schedules sends, but it doesn't scan your inbox for threads that went cold or write the follow-up for you. People who mainly forget to follow up — rather than needing to schedule sends — often want a tool aimed at that specific problem.
Which Boomerang alternative writes follow-up emails for me?
Thread Pilot is the alternative built specifically around drafting. It scans your inbox for threads where you sent the last message and got no reply, then uses GPT-4 to draft a contextual follow-up in your voice, saved as a Gmail draft under a 'DraftsToReview' label for you to review and send. Most other tools on this list remind you or send templates/sequences; they don't compose a contextual follow-up for a specific cold thread.
Do these alternatives send emails automatically?
Some do, some don't — and it matters. Mixmax and GMass run automated sequences and mail merges that send on a schedule; Boomerang's own Send Later auto-sends too. Thread Pilot deliberately does not auto-send: it only creates drafts you review and send yourself. If keeping a human in the loop on every message is important to you, check each tool's sending behavior before you commit.
Can I replace Boomerang's send-later scheduling?
Yes — Right Inbox, Mixmax, and GMass all offer send-later scheduling, and Gmail itself has a native Schedule Send option (click the arrow next to Send) that's free. If send-scheduling is the only Boomerang feature you use, Gmail's built-in scheduler may be enough. If you need scheduling plus other power features, Right Inbox is a close, often cheaper analog.