Proton Mail vs Spark Mail
Features, use cases, pros and cons, and pricing side by side — and which one to pick.
Quick verdict: Pick Proton Mail if privacy comes first; pick Spark Mail if you want a smarter, team-friendly inbox.
Best for: Privacy-minded individuals who don't want their inbox scanned for ads or AI training, Gmail users who want a simple exit without losing old messages
Read the full Proton Mail reviewBest for: People overwhelmed by newsletters, notifications, and crowded inboxes, Professionals who want important emails surfaced automatically
Read the full Spark Mail reviewCommission may apply at no extra cost
Proton Mail vs Spark Mail: features compared
Compare key features side by side
Feature Comparison Summary
Which should you choose?
Choose Proton Mail if
- You want end-to-end encryption that keeps even Proton out.
- You're leaving Gmail and want one-click import with Easy Switch.
Choose Spark Mail if
- You juggle Gmail, Outlook, iCloud, and IMAP accounts in one app.
- You want AI drafting, summaries, and meeting notes built in.
- Your team co-writes and delegates emails with deadlines and tracking.
Proton Mail vs Spark Mail: pros and cons
Proton Mail
Proton Mail backs its privacy promises with real substance: end-to-end encryption on every plan, open-source apps that are independently audited, tracker blocking, and a one-click switch from Gmail. The trade-offs are thin free storage, a 25 MB attachment cap, and rates tied to yearly billing. Overall, it's a recommendable pick for anyone who wants private email without technical fuss.
Pros
- End-to-end and zero-access encryption applies to every plan, including the free tier, so not even Proton can read your messages — and it runs in the background with no technical configuration.
- Easy Switch imports messages, contacts, and calendars from Gmail, Outlook, and Yahoo in one click, and Gmail users can keep syncing new mail and send from their old Gmail address inside Proton.
- Built-in tracker blocking stops senders from monitoring what you read and click, while PhishGuard flags phishing attempts and link confirmation verifies destinations before you click.
Cons
- The advertised rates require a 12-month commitment — Mail Plus bills $47.88 yearly and Proton Unlimited $119.88 yearly, which won't suit month-to-month budgets.
- The free plan caps you at 1 GB of storage (500 MB to start) and a single email address, so heavy attachment users and anyone needing custom domains must upgrade.
- Connecting third-party clients like Outlook, Apple Mail, or Thunderbird requires Proton Mail Bridge, which is available only on paid plans — free users are limited to Proton's own apps.
Spark Mail
Spark Mail tidies crowded inboxes with Smart Inbox, Gatekeeper, and timing tools, and its free plan is genuinely usable across every major platform. The catch: AI features sit behind monthly quotas and paid tiers, and team tools only shine if colleagues use Spark too. Overall, it's a strong pick for anyone craving calmer email.
Pros
- Smart Inbox automatically sorts newsletters and notifications into separate inboxes the moment they arrive, so important mail is what you see first — no manual filter rules to build
- Gatekeeper screens emails from unknown or unwanted senders before they reach your main inbox, letting you review or block them entirely
- Full cross-platform coverage on Mac, Windows, iOS, and Android with unified sync for Gmail, Outlook, iCloud, Yahoo, Exchange, and other IMAP accounts
Cons
- The free plan's AI Assistant only reads one month of email history and includes just 5 lifetime AI meeting notes, so meaningful AI use effectively requires a paid tier
- Plus and Pro draw drafting, summaries, and meeting notes from a monthly AI quota — Pro's 'unlimited meeting notes' is still capped by that quota, and heavy users must buy one-time add-ons
- Collaboration features like shared drafts and delegation only deliver value if your teammates also use Spark, limiting usefulness for solo users
Proton Mail and Spark Mail in detail
Proton Mail
Proton Mail is an encrypted email service from Switzerland and the world's largest end-to-end encrypted email provider. Over 100 million people and 100,000 businesses use it, including journalists and activists. Encryption runs quietly in the background, so no technical skill is needed. It fits everyday users who want to leave Gmail behind, professionals handling sensitive messages, and companies needing encrypted email with custom domains.
Standout features
- Encryption that stays out of your way
- Switch providers without losing a thing
- Trackers blocked, phishing flagged
- A familiar inbox, just private
Use cases
- Switching from Gmail without losing anything
- Handling sensitive conversations
- Branded email for your small business
- Signing up for websites without spam
Spark Mail
Spark Mail is a cross-platform email app that brings your accounts together in one place, including Gmail, Outlook, iCloud, Yahoo, Exchange, and other IMAP providers. It's aimed at people who feel overwhelmed by email — professionals, freelancers, and teams that want less noise and more focus. With 21+ million users, an Apple Editors' Choice award, and a 4.6 iOS App Store rating, it's a well-established option.
Standout features
- A quieter inbox, by default
- Important mail stays front and center
- Email on your schedule
- Collaboration built into your inbox
- One home for every account
Use cases
- Quiet a crowded inbox
- Keep important senders visible
- Turn email into teamwork
- Run every account on your schedule
Pricing compared
List prices from each vendor's pricing page, before taxes and add-ons. Costs are per month.
| Pricing compared | Proton Mail | Spark Mail |
|---|---|---|
| From (cheapest paid plan) | $4.99/mo Mail Plus | $10/mo Plus · per user |
| Free plan | Yes 1 GB storage, 1 email address, 25 MB attachments | Yes AI Assistant limited to 1 month of email history; 5 meeting notes (lifetime) |
| Free trial | Not stated | 7 days |
| Money-back guarantee | 30 days | Not stated |
| Annual billing savings | Up to 23% | Up to 18% |
| Pricing model | Flat price | Per user |
| Cost for 1 user | Free Proton Free plan, billed annually | Free Free plan, billed annually |
| Cost for 5 users | $3.99/mo Mail Plus plan, billed annually · price per account (user limit not stated) | $41.25/mo Plus plan, billed annually |
| Cost for 10 users | $3.99/mo Mail Plus plan, billed annually · price per account (user limit not stated) | $82.50/mo Plus plan, billed annually |
| Cost for 25 users | $3.99/mo Mail Plus plan, billed annually · price per account (user limit not stated) | $206.25/mo Plus plan, billed annually |
| Plans | 3 | 4 |
| Prices checked | Vendor page checked Oct 12, 2026 | Vendor page checked Oct 13, 2026 |
| Price history | Tracking prices since Oct 1, 2026. No price change detected yet. | Tracking prices since Oct 1, 2026. No price change detected yet. |
- Cheapest plan that fits each team size. Per-user plans are multiplied by the number of users (respecting stated minimums and seat packs). Plans that include some users cost their base price plus the extra-user price for each user beyond those included. Flat-priced plans with no stated user limit are counted as one licence per user.
Cheaper for your team size
For 1 user (billed annually), Proton Mail and Spark Mail both cost $0/mo.
- Both tools have a free plan.
Computed from published list prices on the dates shown. Excludes taxes, add-ons and promotions.
More comparisons
Frequently Asked Questions
Which one is more private?
Proton Mail. Its end-to-end, zero-access encryption means even Proton can't read your messages. Spark stores and encrypts data through Google Cloud, so fully local-only storage isn't available.
Do both apps work with Gmail?
Yes. Proton Mail imports Gmail via Easy Switch and can keep syncing new mail. Spark connects Gmail, Outlook, iCloud, Yahoo, Exchange, and other IMAP accounts in one app.