Self-Hosted Email vs Google Workspace & Microsoft 365: Cost & Control (2026)
Google Workspace and Microsoft 365 charge for email the same way: per user, per month, forever. That model is fine at three people and painful at fifty — and you have no say over the next price increase. Self-hosted email flips the model to a flat cost you control. This guide is the honest comparison: the real 2026 per-seat math, where the lines cross, the price increases now baked in, what you gain in control, and — just as important — what you give up.
The pricing, side by side (2026)
Section titled “The pricing, side by side (2026)”Both suites price per user, per month, billed annually (month-to-month is ~20% more). These are the 2026 list prices for the business tiers that include custom-domain email:
| Plan | Google Workspace | Microsoft 365 | What you get beyond email |
|---|---|---|---|
| Entry | Business Starter — $7/user/mo | Business Basic — $7/user/mo | Web/mobile apps, 30 GB (Google) / 1 TB OneDrive (Microsoft) |
| Standard | Business Standard — $14/user/mo | Business Standard — $14/user/mo | Desktop apps, 2 TB (Google) / 1 TB (Microsoft), meetings |
| Premium/Plus | Business Plus — $22/user/mo | Business Premium — $22/user/mo | More storage, advanced security/management |
Prices as of 2026 from the official Google Workspace and Microsoft 365 pages — always check current rates. Google Workspace caps Starter/Standard/Plus at 300 users.
Compare that with a self-hosted platform like Vectis Mail: a flat $39/month for unlimited mailboxes within your install and three domains included, running on a VPS you own (typically $15–20/month). Call it ~$59/month all-in — and crucially, that number does not move when you add a mailbox.
Where the lines cross
Section titled “Where the lines cross”Here is the same business tier ($14/user/month, billed annually) against a fully-loaded self-hosted setup, by mailbox count:
| Mailboxes | Workspace / Microsoft 365 Standard | Self-hosted (flat, ~$59/mo) | Annual saving |
|---|---|---|---|
| 5 | $840/yr | $708/yr | $132 |
| 10 | $1,680/yr | $708/yr | $972 |
| 25 | $4,200/yr | $708/yr | $3,492 |
| 50 | $8,400/yr | $708/yr | $7,692 |
| 100 | $16,800/yr | $708/yr | $16,092 |
The crossover is early: on the $14 standard plans, self-hosting wins at about five mailboxes; even on the cheapest $7 entry plans, it wins around eight to nine. Past that point the gap only widens, because the hosted bill is a slope and the self-hosted bill is a flat line.
This is the structural difference: per-seat pricing taxes growth. Every new hire, every shared inbox you turn into a real mailbox, every role account (support@, sales@, billing@), every contractor — each one is another recurring charge on Workspace or Microsoft 365. On a self-hosted platform, they are free. The thing that makes your business bigger is the thing that makes the per-seat bill bigger; flat pricing breaks that link.
The ratchet: price increases you don’t control
Section titled “The ratchet: price increases you don’t control”Per-seat pricing has a second cost beyond the slope — you ride every vendor price increase, multiplied by every seat.
- Google raised Workspace prices 17–22% in January 2025 when it bundled Gemini AI into every plan — whether or not you wanted the AI.
- Microsoft raises 365 commercial plans again in July 2026, bundling new AI and security features into the price.
When you run 40 seats, a “$2/user” increase is another $960/year, and you find out when the invoice changes — not when you decide. A self-hosted server’s cost is your VPS. It does not go up because a vendor added a feature to a tier you’re already on.
Beyond cost: the control you get back
Section titled “Beyond cost: the control you get back”Cost is the headline, but for many teams the deeper reason to self-host email is control:
- You hold the data. Mail lives on infrastructure you choose, in a jurisdiction you choose. No third party scans, indexes, or mines it. For GDPR, data-residency, or internal-audit requirements, “we run it ourselves, here” is a much shorter conversation.
- No vendor lock-in. Standard IMAP/SMTP, your own DNS, your own backups. Moving providers doesn’t mean exporting from a walled garden.
- No per-seat tax on growth. Add mailboxes, domains, and aliases without re-reading a pricing page.
- No surprise feature-gating. The capability you have today doesn’t get moved to a higher tier next renewal.
What you give up (the honest other side)
Section titled “What you give up (the honest other side)”Self-hosting email is not free of trade-offs, and pretending otherwise would be dishonest:
- The suite. No Docs/Sheets, Word/Excel, Drive/OneDrive, or Teams/Meet. If your team needs those, you still need a suite (or open-source equivalents) for them — see the hybrid below.
- You carry the ops. Patching, backups, monitoring, and the occasional 2 a.m. issue are yours. A good platform shrinks this to roughly half an hour a week at steady state, but it is not zero.
- Deliverability is on you. Google and Microsoft manage IP reputation invisibly. Self-hosted, you own a clean IP, correct authentication, and a warmup period. Modern stacks automate most of it — see our deliverability guide — but the responsibility shifts to you.
When each option makes sense
Section titled “When each option makes sense”| Stay on Google Workspace / Microsoft 365 if… | Self-host your email if… |
|---|---|
| Your team lives in Docs/Sheets/Teams daily | Email is the main thing driving your per-seat bill |
| You want zero infrastructure responsibility | You run many mailboxes, shared inboxes, or role accounts |
| You have fewer than ~5 mailboxes | Data residency, sovereignty, or no-lock-in matters |
| You need the suite’s compliance/eDiscovery tooling | You have (or can rent) basic technical capacity |
For most small teams the answer isn’t all-or-nothing.
The hybrid: take email off the meter, keep what you use
Section titled “The hybrid: take email off the meter, keep what you use”The cheapest sensible setup for a lot of growing teams is hybrid: keep a small number of Workspace or Microsoft 365 seats for the people who genuinely need Docs, Excel, or Teams, and move your mailboxes — especially shared inboxes, role accounts, and the long tail of staff who only really use email — to a self-hosted platform.
You pay the suite only for the seats that use the suite, and email stops being a per-user charge across the whole company. Run the two side by side during migration (a dual-send overlap protects deliverability while your new IP warms up), then cut over the mailboxes when you’re confident.
How Vectis Mail fits
Section titled “How Vectis Mail fits”Vectis Mail is the self-hosted side of this comparison done the modern way:
- Flat $39/month, unlimited mailboxes within your install, three domains included — never priced per send or per seat.
- One-command install of a proven stack (Postfix, Dovecot, Rspamd) with declarative config and atomic, auto-rollback updates.
- Deliverability built in — automatic DKIM/SPF/DMARC, a built-in IP-warmup schedule, RBL monitoring, and a deliverability checker.
- Bundled webmail and a transactional REST API for app-generated mail.
It is email infrastructure you own — not a productivity suite, and we won’t claim otherwise. If email is what’s quietly inflating your Workspace or Microsoft 365 bill, this is how you take it back.
Frequently asked questions
Section titled “Frequently asked questions”Is self-hosted email cheaper than Google Workspace or Microsoft 365?
Section titled “Is self-hosted email cheaper than Google Workspace or Microsoft 365?”Above a handful of mailboxes, yes — often dramatically. Google Workspace and Microsoft 365 charge per user, per month, forever, so the bill scales with headcount. Self-hosted email is a flat cost (your server plus a flat licence like Vectis Mail’s $39/month) regardless of mailbox count. On the common $14/user/month business plans, a fully-loaded self-hosted setup (~$59/month all-in) breaks even at about five mailboxes and saves more with every seat after that.
Does self-hosted email replace Google Workspace or Microsoft 365 entirely?
Section titled “Does self-hosted email replace Google Workspace or Microsoft 365 entirely?”No — and this is the honest part. Workspace and Microsoft 365 are full productivity suites: email plus Docs/Sheets/Slides or Word/Excel/PowerPoint, Drive/OneDrive, Meet/Teams, shared calendars and more. Self-hosted email replaces the email layer, not the whole suite. If your team lives in those documents and meetings every day, that is real value you would be giving up. The cost argument is strongest when email is the main thing driving your per-seat bill, or when you keep a few suite seats for power users and move the rest of your mailboxes off the per-seat meter.
How many mailboxes do I need before self-hosting pays off?
Section titled “How many mailboxes do I need before self-hosting pays off?”On the entry plans ($7/user/month) the lines cross at roughly eight to nine mailboxes once you include a VPS. On the standard business plans ($14/user/month) it is about five. Below that, a hosted suite is usually the more economical and lower-effort choice. The more mailboxes, shared inboxes, and role accounts you run, the further self-hosting pulls ahead — because none of them add to the bill.
Can I keep Google Docs or Microsoft Office but self-host just my email?
Section titled “Can I keep Google Docs or Microsoft Office but self-host just my email?”Yes, and it is a common pattern. You can move your mailboxes to a self-hosted server while keeping a smaller number of Workspace or Microsoft 365 seats for the people who genuinely need Docs, Teams, or Excel. You only pay the suite for the seats that use the suite, and your email stops being a per-user charge. This hybrid is often the cheapest sensible setup for a growing team.
Will self-hosted email land in the inbox as reliably as Google or Microsoft?
Section titled “Will self-hosted email land in the inbox as reliably as Google or Microsoft?”It can, but the responsibility shifts to you. Google and Microsoft manage IP reputation for you. Self-hosted, your deliverability depends on a clean sending IP, correct SPF/DKIM/DMARC, valid reverse DNS, and a sensible warmup. Vectis Mail automates the authentication and ships warmup and monitoring tooling, but it never guarantees inbox placement — no honest provider can. Budget a warmup period and run a dual-send overlap when migrating.
Microsoft 365 and Google both raised prices — does that change the math?
Section titled “Microsoft 365 and Google both raised prices — does that change the math?”It widens the gap. Google raised Workspace prices 17–22% in January 2025 when it bundled Gemini into every plan, and Microsoft 365 commercial plans rise again in July 2026. Per-seat pricing means every increase is multiplied by every seat you run, and you have no control over when the next one lands. A self-hosted server’s cost is your VPS — it does not ratchet up because a vendor bundled a new AI feature.
Next steps
Section titled “Next steps”- Should you self-host email? The 2026 decision guide — the full TCO and deliverability reality check
- The best self-hosted email servers in 2026 — an honest 8-way platform comparison
- Email deliverability best practices — how to land in the inbox once you’ve moved
- Pricing — Vectis Mail’s flat, never-per-send plans
Written by Ian Holt