For sending sales email from your own inbox, the published limits for Gmail and Outlook are both far above what a small sender should use. Google lists 2,000 messages a day for a paid Workspace account. Microsoft lists 10,000 recipients a day and 30 messages a minute for Exchange Online. A careful cold sender stays near 20 to 50 a day per inbox, so the limit almost never decides the question. What decides it is which inbox your customers already see you in, which setup you can finish this week, and which one your tools can send from. Below is a side-by-side with the source and date next to every number.
What you are really choosing
You're not picking the better email company. You're picking the address that outreach and customer mail will come from, because that address builds a sending history. Switching later means starting that history over. Most small businesses already have one or the other, so the practical question is whether to use what you have or set up a second address for outreach.
Published limits and setup, side by side
All figures below are as published on each company's own pages, checked in October 2026. Both companies change limits and prices, so confirm before you rely on one.
| Item | Gmail and Google Workspace | Outlook and Microsoft 365 (Exchange Online) |
|---|---|---|
| Personal account sending limit | 500 emails a day and 500 recipients per message; if reached, sending resumes in 1 to 24 hours (Google's Gmail help page) | Microsoft's help pages for personal Outlook.com accounts list their own limits; check that page, I did not confirm the current figures |
| Business account sending limit | 2,000 messages a day, 500 on a trial account (and Google says limits rise after a paid history); 3,000 external recipients a day (Google Workspace sending limits page) | 10,000 recipients a day and 30 messages a minute per mailbox; trial tenants capped at 5,000 external recipients a day (Exchange Online limits page, updated September 2026) |
| SPF | Publish Google's include in your domain's SPF record | Publish Microsoft's include in your domain's SPF record |
| DKIM | Generate a key in the Google Admin console and publish it in DNS | Turn it on for your domain in Microsoft's Defender portal and publish the records it gives you |
| Cost for one person | Business Starter listed at $7.00 per user per month on Google's pricing page | Microsoft publishes per-user prices on its Microsoft 365 business pricing page; I could not confirm the current figure |
| Cost for five people | $35 a month at the same listed price | Five times the per-user price |
Treat the "check that page" cells as an honest gap, not an oversight: I'd rather leave a number out than guess it. Microsoft's own documentation also notes that Exchange Online isn't designed for bulk-mailing scenarios, and Google's personal-account help page points large audiences to Google Groups instead. Both are built for people writing to people.
Limits are ceilings, not targets
At 50 sends a day, you'd use 2.5 percent of Google's 2,000 a day. Against Microsoft's 10,000 recipients a day, you'd use half of one percent. That gap is why the limits tell you nothing about deliverability. A new address that jumps to hundreds of sends gets noticed long before it reaches either ceiling. The practical schedule is in how many cold emails per day from Gmail, and the Gmail-versus-Workspace question is in Google Workspace vs Gmail.
Domain authentication, compared
If you send from your own domain, the three DNS records (SPF, DKIM and DMARC) matter on either platform. The steps differ in where you click, but the job is the same: prove the mail comes from you. SPF, DKIM and DMARC for cold email walks through them. A free Gmail address needs none of this, since Google handles authentication for gmail.com.
Search, labels and rules for sales replies
Both do what a small sender needs. Gmail uses labels, filters and search operators; Outlook uses folders, rules, categories and search. For tracking outreach replies, either one works for the first 20 or 30 conversations. After that, a separate list or board is easier, which is the subject of Gmail CRM.
Calendar and booking links
Both ship a calendar that can share free times, and both have a separate booking feature (Google calendar appointment schedules, Microsoft Bookings). Which plan includes which feature changes, so check your own plan. What matters for outreach is that a meeting lands on the calendar you actually look at.
Which job do you need done
- You already live in Gmail or Google Workspace: use that address, and keep volume modest.
- You live in Outlook and want outreach in the same place: you can send from it manually. Check that any tool you add can send from Outlook.
- You want an AI worker to send for you: Rocketship sends from a Gmail or Google account, not from Outlook. If your main mail is on Outlook, you'd set up a separate Google address for outreach and replies would come to it. See what permissions an outreach tool needs from your Gmail.
- You'll grow beyond one person sending: see cold email infrastructure for how many inboxes a volume needs.
Rocketship finds the buyers, emails them from your own Gmail, follows up, and books the meeting on its own. Plans that get you customers start at $24.99 a month (Launch), and both Launch and Frontier start with a 7-day free trial, card required. Answering your existing number works on Launch, with call minutes bought as you go ($15 for 50), and a dedicated line is $5 a month.