Is GMass a serious alternative to Reply?

For an individual, yes. For a team, no. GMass sends from the Google account it is installed in, has no multichannel steps and no team-level sequencing. Reply is built around unlimited users and five channels.

What is the price difference?

GMass is $29.95/mo monthly or $20/mo billed annually. Reply is $179/mo monthly or $159 annually. Roughly six to eight times, depending on billing basis.

Do either require a specific email provider?

GMass requires Gmail or Google Workspace and Chrome. Reply connects Gsuite, Microsoft and SMTP accounts, so it is provider-agnostic.

Which includes warmup?

Reply includes warmup and inbox rotation. We found no documented warmup feature for GMass on its pricing or product pages — a gap in our verification rather than proof it lacks one.

GMass vs Reply.io

The widest gap in this catalog, and worth stating plainly: GMass is a $29.95 Chrome extension for one Gmail account, Reply is a $179 multichannel sales platform. Nobody is genuinely torn between them — but they turn up on the same lists, so here is where the line falls.

GMass

Mail merge and cold email inside Gmail, as a Chrome extension.

4.2From $29.95/mo

Visit GMass

Reply.io

Multichannel sales engagement with an AI SDR, priced well above the cold-email field.

4.3From $179/mo

Visit Reply.io

Feature	GMass	Reply.io
Rating	4.2	4.3
Starting price	$29.95/momonthly billing; $20/mo billed annually ($249/yr)	$179/momonthly billing; $159/mo billed annually (~17% off)
Free trial	Yes	Yes
Runs inside	Gmail / Google Workspace	—
Delivery	Chrome extension	—
Individual plans	$29.95 / $39.95 / $59.95 monthly	—
Annual discount	$20/mo billed yearly (Standard)	—
Team plans	5 → 100 users, priced per seat	—
Email accounts	—	Unlimited (fair usage policy)
Active contacts	—	10,000/mo (Email Volume entry)
Warmup included	—	Yes
Inbox rotation	—	Yes
Multichannel	—	LinkedIn, calls, SMS, WhatsApp
Live data credits	—	50/month included

Hands-on field test

In progress

We plan to run identical 200-contact campaigns from freshly warmed mailboxes on each platform (same copy, same sending window, same domains) and measure inbox-placement rate via seed tests, plus bounce and reply rates. Until that runs we quote no deliverability figures.

The verdict

GMass is for an individual sending from Gmail who wants mail merge and follow-ups without a platform. Reply is for a sales team running coordinated multichannel sequences with a data layer and optional AI SDR. If you are choosing between them, the real question is whether outbound is a personal task or a team function — the price difference simply follows from that.

Choose GMass if you send from one Gmail account and want the lowest-friction tool that exists. Choose Reply.io if outreach is a staffed, multichannel function and you need unlimited users and mailboxes.

Visit GMass Visit Reply.io

GMass vs Reply.io: FAQs

Is GMass a serious alternative to Reply?: For an individual, yes. For a team, no. GMass sends from the Google account it is installed in, has no multichannel steps and no team-level sequencing. Reply is built around unlimited users and five channels.
What is the price difference?: GMass is $29.95/mo monthly or $20/mo billed annually. Reply is $179/mo monthly or $159 annually. Roughly six to eight times, depending on billing basis.
Do either require a specific email provider?: GMass requires Gmail or Google Workspace and Chrome. Reply connects Gsuite, Microsoft and SMTP accounts, so it is provider-agnostic.
Which includes warmup?: Reply includes warmup and inbox rotation. We found no documented warmup feature for GMass on its pricing or product pages — a gap in our verification rather than proof it lacks one.

Comparing more than two?

Put GMass, Reply.io and up to two others side by side on price, mailboxes, warmup and trials.

Open the comparison table →