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GMass lives inside Gmail and installs in thirty seconds. CraftNudge drives many inboxes on many domains from one place. If you send from one Gmail account, GMass is the simpler tool. The rest of the split is below.
Each claim about GMass links to the page we read it on. We read them all on 14 September 2026.
| GMass | CraftNudge | |
|---|---|---|
| Where it runs | GMassInside Gmail, as a Chrome extensionsource | CraftNudgeA web app that drives your inboxes over SMTP and IMAP |
| Inboxes | GMassGmail and Google Workspace only. Outbound SMTP only for other servers.source | CraftNudgeAny SMTP and IMAP server with a username and password, Google Workspace with an app password. No OAuth. |
| Per-inbox cap and ramp | GMassA daily cap you set and a pause between emails, with a cap per account in MultiSend. No ramp. | CraftNudgeDaily cap, a ramp up from a starting number, a minimum gap with jitter |
| Per-domain cap and ramp | GMassNosource | CraftNudgeA daily cap per domain shared by its inboxes, and a weekly warmup ramp per domain |
| Sending window | GMassDays, a daily start and end time, and a time zone, per campaignsource | CraftNudgeUp to four windows per campaign, each with its own days and hours, in the campaign’s timezone or each lead’s own |
| Sequences | GMassUnlimited threaded follow-ups on no reply, no open or no click, plus triggered emails, on Premium and up | CraftNudgeMulti-step with waits and threaded follow-ups on every plan, plus manual LinkedIn and call steps and a step for interested or not interested replies only. |
| A/B variants | GMassOn Premium and up, with per-variant stats and the winner sent automatically | CraftNudgeUnlimited, the winner favoured after a number of sends you set, per-variant stats, on every plan |
| Merge fields | GMassFields, fallbacks, spintax, conditional contentsource | CraftNudgeFields, fallbacks and spintax |
| Unified inbox | GMassGmail is the inbox, with replies and bounces labelled automatically. MultiSend replies in one place on Professional. | CraftNudgeYes, across every connected inbox, with interest labels and reply in the same thread |
| Lead lists and dedupe | GMassGoogle Sheets as the list. Suppression by past campaign and by days since the last email. | CraftNudgeReusable lists, one campaign at a time, a re-contact window |
| Email verification | GMassFree on every plansource | CraftNudgeOn your own Reoon account, before the first send, with invalid and risky addresses skipped by default. A free mail server check as well. |
| One-click unsubscribe | GMassYes | CraftNudgeYes, RFC 8058, on by default |
| Custom tracking domain | GMassYes | CraftNudgeYes, off until its DNS check passes |
| Analytics | GMassPer campaign and per variant, with CSV, Excel or Sheets export. Per account partly.source | CraftNudgePer campaign, inbox, day, step and variant, over any dates, with a daily chart, conversions and their value, each client workspace side by side, and CSV export |
| API and webhooks | GMassAPI on Premium and up. Webhooks, replies included. | CraftNudgeAPI on every plan. Signed, retried webhooks for seven events (sent, reply, bounce, unsubscribe, interested, interest changed, task due), and REST hooks a Zap can subscribe to. |
| Integrations | GMassZapier, and sends logged into HubSpot or Salesforce by BCC | CraftNudgeNotes into HubSpot or Pipedrive on a reply or a change of interest, Zapier through REST hooks, and a signed webhook. No two-way sync. |
| Team | GMassTeam planssource | CraftNudgeOwner and member |
| Warmup | GMassNone, shut down in 2023 | CraftNudgeNone, by design |
| Placement test | GMassYes, to a seed listsource | CraftNudgeTo your own seed addresses, results recorded by hand |
| Pricing | GMassStandard $29.95/mo ($249 a year): one Gmail account, no follow-ups, no API, no A/B. Premium $39.95/mo ($349 a year) adds all three. Professional $59.95/mo ($599 a year) adds MultiSend. 7-day trial. Charged per Gmail account. | CraftNudgeStarter $29/mo, 3 inboxes. Agency $149/mo, 30 inboxes. Contacts and sends unlimited. Charged by sending inbox. |
GMass Standard is $29.95 a month, or $249 a year, for one Gmail account without follow-ups, A/B or the API. Premium is $39.95 a month, or $349 a year, and adds all three. Professional is $59.95 a month, or $599 a year, and adds MultiSend, where the extra sending accounts need no plan of their own. The trial is 7 days. Each plan is charged per Gmail account, which is effectively a seat. GMass's pricing page shows prices in local currency, so the dollar prices are from its January 2026 post. CraftNudge Starter is $29 a month for three sending inboxes and Agency is $149 for thirty, with contacts and sends unlimited and a 14-day trial without a card. Checked on 14 September 2026.
GMass launched in September 2015 in Chicago and is bootstrapped. Latka estimates $8.6m in revenue for 2024, up from $1.4m in 2020, and counts 11 people, while its about page names seven. GMass says 400,000 people use it, Latka lists 200,000 customers, and the Chrome Web Store shows 400,000 and more users. No 2025 or 2026 revenue figure is public.
If you send from one Gmail account and your list lives in a Google Sheet, GMass is cheaper to learn and already where you work. Come to CraftNudge when you have several inboxes on several domains, some of them not Google, and you need the caps and the ramp enforced across all of them from one place.