GMass vs Instantly
We give GMass a 2.4 GPA and Instantly a 2.6, out of 4.0. GMass grades higher on ease of use. Instantly grades higher on value for money and platforms. They get the same grade on the free plan and features.
Price, platforms and features side by side. The table says where each price was read and when.
GMass
Mail merge and cold email campaigns sent from inside Gmail
Instantly
Cold email from unlimited inboxes, priced by emails and contacts
How we grade them
| 2.4GPAGMassFair | 2.6GPAInstantlyGood | |
|---|---|---|
| Value for money | BFive people on the Team plan pay $145 a month billed annually for every feature, $29 a head, or $175 billed monthly. That's inside the cheaper quarter's $32.50. A solo sender who wants follow-ups needs Premium at $29 an account billed annually. | AA team of five needs Hypergrowth, since Growth's 1,000-contact total and read-only inbox won't stretch that far: $77.60 a month billed yearly for everyone, about $15.52 a head. That's under 60% of the cheaper quarter's $32.50 in this category. |
| Free plan and trial | CNo free plan. The 7-day trial needs no card but is capped at 50 emails a day, enough to check it works in your Gmail. | CNo free plan, but a 14-day trial with no card. It stops at 250 uploaded contacts and 1,000 emails, which is enough to warm up and send a small first campaign, and not much more. |
| Features | CThe email job done fully from Gmail: unlimited emails and contacts, mail merge from Sheets, follow-ups that stop on a reply, A/B tests, inbox rotation and SMTP for big sends. It's a smaller job, though: no LinkedIn steps, and Standard has no follow-ups. | CThe email side is complete: unlimited inboxes and warm-up, multi-step campaigns, A/Z tests, one inbox for replies and automations. But there are no LinkedIn steps at all, and lead search and the AI agents need a separate credits plan from $9 a month. |
| Ease of use | BNo App Store rating on record, but it lives inside the Gmail you already use: write an email, pick a list or a Sheet and press the GMass button. Very little to learn. | CNo App Store rating on record. You'll be connecting mailboxes and waiting on warm-up before the first real send, and actually replying from the Unibox needs Hypergrowth. |
| Platforms and integrations | CIt needs Gmail or Google Workspace and the Chrome browser, so it's a computer-only tool. Google Sheets and Zapier connect, and there's an API from Premium. | BWeb only, but with HubSpot, Slack, Zapier, Findymail, RB2B and ChatGPT links, webhooks from Hypergrowth and a public API. No phone or desktop app on record. |
| Best for | cold email without leaving Gmail | cold email from as many inboxes as you like |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: GMass and Instantly. How we grade
Price against what you get
GMass starts at $20 a month and scores 2.3 out of 4 on features, ease of use and platforms. Instantly starts at $37.60 a month and scores 2.3.
They score the same, and GMass starts $17.60 a month lower. Of the other cold outreach tools on the chart, none scores higher than GMass for less, and 3 score higher than Instantly for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- GMass starts at $20 per account / month, billed annually ($29.95 billed monthly). Instantly starts at $37.6 per month for 5,000 emails, billed yearly ($47 monthly).
- Only GMass lists a browser extension.
- Instantly also covers workflow automation and AI agents.
At a glance
| GMass | Instantly | |
|---|---|---|
| Pricing | Free trial | Free trial |
| Starts at | $20 per account / month, billed annually ($29.95 billed monthly) | $37.6 per month for 5,000 emails, billed yearly ($47 monthly) |
| Free plan | None | None |
| Free trial | 7-day free trial limited to 50 emails per 24 hours, no credit card required | 14-day free trial, no card required, with 250 uploaded contacts and 1,000 emails |
| Web | ||
| Browser extension | ||
| Made by | GMass, Inc. | Foo Monk, LLC (Instantly) |
| Price read from | gmass.co | instantly.ai |
| Checked | Oct 17, 2026 | Oct 17, 2026 |
Who each one suits
GMass
- People who want to send cold email without leaving Gmail
- Mail merges from a Google Sheet, including recurring sends
- Solo senders who need follow-ups but not a separate outreach app
Instantly
- Agencies and teams spreading volume across many mailboxes
- Senders who want warmup included rather than bought per inbox
- Buyers who want a lead database and sending in one account
Worth knowing
GMass
- Needs a Gmail or Google Workspace account and the Chrome browser; campaigns are written and sent from inside Gmail.
- Each subscription covers one Gmail account, and the Standard plan has no automatic follow-ups.
- Inbox rotation needs Professional or a Team plan; sending through GMass's own SMTP service costs $5 per 10,000 messages.
- Gmail's own daily sending limits still apply to anything sent through the Gmail account itself.
Instantly
- There is no free plan; the 14-day trial stops at 250 uploaded contacts and 1,000 emails.
- The uploaded-contact limit is a total across all campaigns, not a monthly one. On Hypergrowth and up, 25,000 more contacts cost $87 a month.
- Lead data and the AI agents need an Instantly Credits plan, from $9 a month for 150 credits; the CRM is a separate add-on from $47 a month.
- Replying from Unibox, webhooks and full A/Z testing need Hypergrowth, $97 a month billed monthly.
Key features
GMass
- Campaigns from the Gmail compose window
- Write a campaign as an ordinary Gmail message, address it to a list, label or Google Sheet, and send it with the GMass button from your own account.
- Automatic follow-ups
- Unlimited follow-up stages that stop when a contact replies, clicks or opens, sent in the same thread or as new ones. Needs Premium or above.
- Google Sheets campaigns
- Merge fields come from a Google Sheet, GMass picks up edits made before a scheduled send, and new rows can be emailed automatically.
- Inbox rotation and SMTP
- MultiSend spreads one campaign across several mailboxes on Professional and Team, and an SMTP server can carry sends larger than Gmail allows.
- Reports in Gmail, the dashboard and the web
- Opens, clicks, replies, bounces and blocks arrive as Gmail reports, in the dashboard and as shareable web reports, with an AI Deep Analysis of the results.
- AI writing and SpinMax
- AI can draft a full campaign with its follow-ups, and SpinMax varies the wording of every email in a campaign automatically.
Instantly
- Unlimited sending accounts and warmup
- Every Outreach plan connects and warms up any number of email accounts from any provider; the plan limits emails sent and contacts uploaded instead.
- Sequences and A/Z testing
- Multi-step campaigns with sending schedules, a global block list and bounce detection. Growth gets basic A/Z testing; Hypergrowth and above test up to 26 variants.
- Unibox
- Replies from every connected account land in one inbox. It is preview-only on Growth; replying in the app and custom reply labels start at Hypergrowth.
- SuperSearch lead database
- Search more than 450 million B2B contacts and enrich them through several email providers, paid for with Instantly Credits, a separate subscription.
- AI Sales Agent and AI Reply Agent
- Agents that find and contact leads or draft answers to replies. Each lead or reply generated costs 5 credits from the credits plan.
- Automations
- A visual trigger-and-action builder routes and tags leads when they reply, visit your site or book a meeting, and is included on every Outreach plan.
Plans
GMass
Standard$20
per account / month, billed annually ($29.95 billed monthly)
Unlimited emails, contacts and campaigns, mail merge, email verification and Spam Solver. No automatic follow-ups. $249 a year.
Premium$29
per account / month, billed annually ($39.95 billed monthly)
Adds sequences and automatic follow-ups, A/B testing, triggered emails, and the API and Zapier. $349 a year.
Professional$49
per account / month, billed annually ($59.95 billed monthly)
Adds inbox rotation across several sending accounts (MultiSend) and high-priority support. $599 a year.
Team$145
per month for up to 5 users, billed annually ($175 billed monthly)
Every feature, including inbox rotation, for 5 Gmail accounts. Packs of 10, 25, 50 and 100 users cost less per user.
Instantly
Growth$37.6
per month for 5,000 emails, billed yearly ($47 monthly)
1,000 uploaded contacts, unlimited email accounts and warmup, basic A/Z testing and a preview-only Unibox.
Hypergrowth$77.6
per month for 125,000 emails, billed yearly ($97 monthly)
25,000 uploaded contacts, replying from Unibox, webhooks, A/Z tests of up to 26 variants and premium live support.
Light Speed$286.3
per month for 500,000 emails, billed yearly ($358 monthly)
100,000 uploaded contacts and SISR, which rotates dedicated servers and IP addresses for sending.
EnterpriseCustom
More than 500,000 emails a month, a private deliverability network and a dedicated account manager.
Ways to pay less
GMass
- Annual discount
Save up to 31% with annual billing
Standard costs $249 a year against $29.95 a month billed monthly, a saving of about 31%; Premium saves about 27% and Professional about 17%.
- Education
15% off for .edu Google Workspace accounts
GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing.
- Nonprofit
15% off for .org Google Workspace accounts
The same 15% discount applies automatically to Google Workspace accounts on a .org domain; nonprofits on other domains do not get it.
Instantly
- Annual discount
About 20% off with yearly billing
Billed yearly, Growth is $37.6 a month instead of $47, Hypergrowth $77.6 instead of $97 and Light Speed $286.3 instead of $358.
