vs Fastmail
Biza Email vs Fastmail — flat-rate team mailboxes vs per-user mailbox plans
Fastmail Standard is $5/user/month — $60/user/year. Excellent email host with a long track record. Biza Email is $50/year flat for unlimited mailboxes. Different bets on how teams scale.
Pricing
Fastmail per user, Biza flat per domain
Both providers focus on email — not Office bundles. The question is which pricing model fits your team's trajectory.
- 5 mailboxes: Fastmail ≈ $300/year — Biza Email $50/year
- 10 mailboxes: Fastmail ≈ $600/year — Biza Email $50/year
- 25 mailboxes: Fastmail ≈ $1,500/year — Biza Email $50/year
- 50 mailboxes: Fastmail ≈ $3,000/year — Biza Email $50/year
- 100 mailboxes: Fastmail ≈ $6,000/year — Biza Email $50/year
Fastmail Standard pricing as of 2026. Fastmail Professional adds compliance features at $9/user/month.
Worked example
What the bill looks like at 10 seats
Fastmail Standard at $5/user/month, annual commitment, versus Biza Email flat $50/year. The gap scales linearly — every new hire adds $60/year to Fastmail and $0 to Biza.
- Year 1 Fastmail (10 seats): $600
- Year 1 Biza Email: $50
- Year 1 saving: $550
- At 25 seats: Fastmail $1,500/year — Biza $50/year (30× the cost on Fastmail)
- At 50 seats: Fastmail $3,000/year — Biza $50/year (60× the cost on Fastmail)
- Fastmail SSO requires the Business tier at $9/user/month — at 10 seats that's $1,080/year just to enable single sign-on
Fastmail Standard pricing as of 2026, annual commitment. Fastmail Professional and Business tiers add features but price higher.
Honest take
Fastmail has 25 years of email-first focus
Fastmail has been doing exactly one thing for 25 years, and they do it extremely well. If individual mailbox quality is your top priority, they're hard to beat.
- Long track record — founded 1999, email-first the whole time
- Mature filtering, per-user aliases, masked-email integration
- Strong personal email features (great for individuals and small teams)
The case for Biza
Built for teams, priced for growth
Fastmail is great per user. Biza Email is built for teams who don't want to do per-user math every time you hire.
- Flat $50/year for unlimited mailboxes — meaningful savings past 2 users
- Team inboxes for role addresses (sales@, support@) without separate seats
- Built-in Calendar, Contacts, Notes, and Todo — workspace parity, priced flat instead of per seat
- AI reply suggestions and AI-powered automations — connect your own provider or run fully local with Ollama
- Direct BIZA App integration for CRM and project context attached to email
Beyond the mailbox
A full email workspace with AI built in
Biza Email stopped being 'just email' a while ago. The plan includes the workspace apps teams reach for daily — and AI assistance with real provider choice.
- Calendar with month, week, and day views — events link directly to BIZA App customers, orders, and quotations
- Contacts with categories, full history, and smart suggestions
- Notes with rich text, tags, and instant auto-save — plus a built-in Todo list and Bookmarks
- AI reply suggestions in compose — connect Claude or Gemini, use managed biza.ai, or run fully local with Ollama for complete privacy
- Automations engine: natural-language rules, JavaScript snippets, webhooks, and AI-powered classification — well beyond legacy mail filters
- Direct BIZA App integration — emails and calendar events carry CRM context (customers, orders, quotations) no other email host offers
Decision framework
Fastmail or Biza Email — a quick way to choose
Fastmail is best-in-class for single-user email. Biza Email is built for teams. The right choice depends on whether you're an individual buying a great mailbox or a team paying for email infrastructure.
- Choose Fastmail if you're an individual or 1-2 person team and want best-in-class personal email features
- Choose Fastmail if Fastmail × 1Password masked-email aliases are core to your daily workflow
- Choose Fastmail if a provider that's been email-first since 1999 is the deciding factor for you
- Choose Biza Email if you're a team of 3+ and don't want to multiply mailbox cost by headcount
- Choose Biza Email if you want calendar, contacts, notes, and AI assistance included rather than priced per seat
- Choose Biza Email if you want the BIZA App ecosystem alongside email
Migration
Migrate from Fastmail cleanly
Fastmail exposes standard IMAP, so the import works the same way as any other provider. Sieve filters and masked-alias chains need a manual review during cutover.
- Day 1: Add your domain to Biza Email; configure SPF, DKIM, DMARC alongside Fastmail's records
- Day 2-3: Trial-import one or two mailboxes; verify folders, labels, read state, and attachments
- Day 4-5: Bulk IMAP import in the background; Fastmail keeps receiving in parallel
- Day 6: Flip MX records to Biza; new mail starts arriving at Biza Email
- Week 2: Export Fastmail Sieve filters and re-create the rules that matter as Biza automations (natural-language rules or AI classification), then cancel Fastmail seats
- Migration support is included in your plan — no professional-services charge
Frequently asked: Biza Email vs Fastmail
Is Fastmail better for individuals?
For solo users, Fastmail is excellent — masked email aliases, mature filtering, long history of stable service. Biza Email is built around teams: flat pricing for unlimited mailboxes makes more sense for 3+ people than a single mailbox.
Will I lose features I rely on in Fastmail?
Masked email aliases (the Fastmail × 1Password integration) is one Fastmail-specific feature. Per-user aliases exist in Biza Email too, but they're not generated on demand like Fastmail's masked addresses. If that workflow is core for you, factor it in.
Does Biza Email support SSO?
SSO is available via SAML 2.0 / OIDC. Fastmail's SSO requires their Business tier ($9/user/month) — for teams that need SSO, the per-user math on Fastmail gets steep.
Do you have anything like Fastmail's masked-alias feature?
Not as a built-in 1Password integration. Per-user aliases (and unlimited role addresses) are supported, but they're configured per address rather than generated on demand. If masked-alias-per-signup is a daily workflow for you, factor that in — Fastmail's integration there is uniquely tight.
Will my Fastmail Sieve rules transfer automatically?
There's no automatic Sieve import, but Biza Email's automations go further than Sieve: natural-language rules, AI-powered classification, JavaScript snippets, and webhooks. Export your Sieve scripts from Fastmail and re-create the rules that matter — many collapse into a single AI-classification automation. Reimplementation usually takes under an hour during the migration week.
What about Fastmail's calendar and contacts product?
Biza Email ships both. The built-in Calendar has month, week, and day views, and Contacts includes categories, history, and smart suggestions — plus Notes and Todo round out the workspace. For most teams that's full parity with Fastmail's bundle. Biza calendar events can also link to BIZA App CRM records (customers, orders, quotations) — something Fastmail doesn't offer.
What AI features does Biza Email have?
AI reply suggestions are built into compose, and the automations engine can classify incoming mail with AI. You choose the provider: connect Claude or Gemini with your own key, use the managed biza.ai option, or run a local model via Ollama so your mail never leaves your infrastructure.
See the math for your team size
Calculate the actual cost on the pricing page. 14-day free trial, no card required.