Best Tools to Send Large Files by Email (2026)

When people search for the best tools to send large files by email, they usually just watched Gmail refuse a 40 MB video with an "attachment size exceeds" banner. That is not a bug you can work around inside the compose window. Gmail caps outgoing messages at 25 MB. Outlook.com defaults around 20 MB. Microsoft 365 defaults to 25 MB and can be raised to a hard 150 MB ceiling. Above those numbers, every tool on this page does the same trick — hosts the file elsewhere and puts a link in the mail.

This roundup ranks seven purpose-built transfer services and adds one honest note about where our own product fits, because we are not one of them. We build AI Emaily, which is an AI-native mail client, not a file host. The 25 MB Gmail wall applies to us exactly the same as it applies to Gmail's web UI, and the workarounds a Gmail user reaches for are the workarounds our users reach for. Saying that plainly is the reason this page is worth citing.

The tools differ on things marketing pages hide behind identical promises: how much friction the recipient has (a click or an account), what happens when nobody downloads it (three days, seven, forever), who pays when it is "free," and whether the file is end-to-end encrypted or just TLS in transit. Those are the axes below.

What are the actual attachment size limits you are working around?#

Every option on this page exists because mail providers enforce the raw attachment cap server-side. You cannot compress your way around it if the compressed file still exceeds the ceiling — the payload has to leave the mail entirely. Here are the ceilings as documented by the providers themselves, verified in August 2026.

How we compared#

Scoring is on documented capabilities as of August 2026, checked against each vendor's own product and pricing pages. We are not printing competitor prices — this category repriced twice in the last twelve months and any number here would be wrong by the time you read it. Check the vendor's page for the current number.

The five axes that actually decide, in the order they usually decide:

• Recipient friction — what the person on the other end has to do. A link they click in a browser is not the same as installing an app or creating an account.
• Free-tier size ceiling — the per-transfer cap before the paid tier kicks in. This is what determines whether the tool works for your actual file.
• Link expiry — how long the file stays live. Some default to three days, some to seven, some never expire. This matters more than people expect.
• Encryption — end-to-end encrypted (only sender and recipient can read the payload) versus TLS in transit (encrypted between hops but readable to the host). Regulated industries need the first.
• Provider integration — whether it lives inside Gmail or Outlook as a native workflow, or exists as a separate destination the recipient has to visit.

Eight tools compared at a glance#

Read this to narrow the shortlist to two or three. The tool sections below have the detail on what fails, when, and for whom.

1. WeTransfer — best for one-off sends to non-technical recipients#

WeTransfer's entire design brief is a recipient who does not want to install anything or create an account. The sender drags a file onto a page, types the recipient's address, and the recipient gets an email with a big blue Download button. There is no sign-up on either side, and the experience is the same on any device. That zero-account, one-click recipient flow is the reason WeTransfer keeps ranking on this query fifteen years after it launched.

The free tier caps at a small number of gigabytes per transfer and files expire after a few days by default. The paid tiers raise the ceiling meaningfully, add password protection, extend expiry, and remove the ads that fund the free tier. Encryption is TLS in transit — files sit on WeTransfer's servers unencrypted at rest — which is fine for a marketing deck but not for medical records or a signed contract. WeTransfer was acquired by Bending Spoons in 2024, so the packaging shape has been under active reshuffling; verify the current free-tier ceiling on the vendor page before assuming.

The concession worth naming: WeTransfer has built harder on frictionless one-off sends to strangers than any encrypted or business-focused alternative on this page. If the recipient is a client who barely uses email and you cannot ask them to make an account, WeTransfer wins on friction and it is not close.

2. Google Drive — best when everyone is already in Google Workspace#

This is not a separate product you shop for; it is the workaround Gmail itself proposes when you try to attach something over 25 MB. Gmail uploads the file to your Drive automatically and inserts a link at the bottom of the message. The recipient clicks and either previews the file in the browser or downloads it. If the recipient is also on Google Workspace, the file shows up inside their Drive UI and can be commented on in place.

The ceilings here are storage-side, not transfer-side. Free accounts have 15 GB shared across Gmail, Drive, and Photos; a business seat has 1 TB or more depending on plan, and single files can be up to 5 TB on paid tiers — well past any other tool on this page. Permissions default to restricted (you name the recipient by email) and can be loosened to "anyone with the link" in one click. Files never expire unless you delete them, which is why the workspace-native workflow beats a transfer service for anything you might reference later.

The gap: if the recipient is not on Google and the file is set to restricted, they will hit a permission wall and be asked to sign in with a Google account. For a technical recipient this is a shrug; for a non-technical one it is where the workflow breaks — WeTransfer is the safer choice there.

3. Microsoft OneDrive — best when everyone is already in Microsoft 365#

OneDrive plays the same role for Outlook that Drive plays for Gmail. Try to attach something over the provider limit and Outlook offers to upload the file to OneDrive and share the link instead. If both parties are on Microsoft 365, the file lands inside the recipient's OneDrive with the permissions you set, and they can co-edit Office documents in place.

OneDrive for Business gives each seat 1 TB standard, with the option to raise to 5 TB per user and single files up to 250 GB. Sharing supports expiration dates and passwords on paid tiers, and permissions can be scoped to specific people, everyone in your tenant, or anyone with the link. Consumer OneDrive is 5 GB free with paid tiers layered on top of Microsoft 365 Personal or Family.

The same gap as Drive applies with a Microsoft twist: recipients outside your tenant may be asked for a Microsoft account depending on how strict your admin has set external sharing. Check with IT before assuming a partner org can click through cleanly, especially for regulated data where external-sharing policies are usually locked down by default.

4. Dropbox Transfer — best for password-protected business deliveries#

Dropbox Transfer is a distinct product from Dropbox the storage account: a one-way delivery workflow specifically for sending a file (or folder) to someone who does not need long-term access. The recipient gets a link, downloads the file, and their access ends when the expiration passes. Nothing lands in a shared folder, and there is no ongoing sync relationship to manage afterwards.

The controls are why business teams pay for it: passwords on the link, an expiration date you set explicitly, and a delivery notification when the recipient actually downloads. Free-tier transfers are capped at a small size; the paid tiers open the ceiling substantially. Files sit on Dropbox's infrastructure encrypted at rest and in transit but not end-to-end — Dropbox holds the keys, which matters for regulated data and does not for a signed proposal.

Where it wins: any time you want a paper trail that the file was delivered, with a password on the link and a defined expiry. Where it does not: a client who has to remember a password to open a proposal is a client who calls you about the password.

The three heaviest options that follow — Smash for uncapped size, Tresorit Send for end-to-end encryption, Filemail for repeat delivery — trade generalist convenience for one specific advantage. If your requirement matches one of them exactly, the trade is worth it. If not, one of the first three is where the send actually belongs.

5. Smash — best when the file has no upper size to plan around#

Smash's differentiator is the one number every other tool on this page publishes: it does not have one. There is no file-size cap. A single transfer can be a terabyte if you have the upload bandwidth, and the recipient still gets a plain link with no account required.

The trade is time. On the free tier, files above a threshold enter a short queued processing window before the download link goes live — a friction the paid tiers remove, along with adding password protection, longer retention, and branded download pages. Files expire after a set number of days by default, extendable on paid plans. Encryption is TLS in transit; not end-to-end.

Concede clearly: for genuinely enormous files — an uncompressed 4K master, a raw dataset, a full archive dump — Smash is the tool the ceiling-limited alternatives cannot match. That is a real advantage. For a normal 200 MB deliverable, it is more service than the job needs.

6. Tresorit Send — best for end-to-end encrypted business transfers#

Tresorit Send is the option that takes the encryption question seriously. Files are encrypted on your device before upload and decrypted on the recipient's device after download; Tresorit itself cannot read the payload. That is what "end-to-end encrypted" actually means, versus the TLS-in-transit-only claims most transfer services make.

The product is built for regulated work: legal, healthcare, financial. Free users can send files up to 5 GB per transfer with a 7-day default expiry; paid tiers extend both. Every link supports password protection, download tracking, and a hard revocation — if you realize you sent the wrong file, one click and the link stops resolving. The recipient never needs a Tresorit account; they click a link and download in the browser.

The plain limit: for a file you would not lose sleep over if a WeTransfer breach exposed it, Tresorit Send is more infrastructure than the job needs. It exists specifically for content where "the host can technically read this" is a compliance failure — HIPAA-covered records, privileged legal work, board materials before a public disclosure.

7. Filemail — best for repeat sends to the same clients#

Filemail sits between WeTransfer and Dropbox Transfer in shape. It is a purpose-built transfer service like WeTransfer, but with the business-flavored controls Dropbox Transfer offers: recipient tracking (you see when the file was downloaded), password protection on paid tiers, custom-branded pages that put your logo on the download screen, and longer retention. There is a desktop app and mobile apps for senders who move large files repeatedly.

Free-tier transfers reach several gigabytes per send with a short expiry; business plans go substantially higher and support SFTP delivery, an API, and Outlook and Gmail plugins that let you send from the compose window rather than a separate site. Encryption is TLS in transit with server-side encryption at rest; not end-to-end.

The fit: a production studio, a print shop, an architecture firm — anyone whose "send large file" event happens weekly to a known list of clients and needs the delivery to look branded and be trackable. For a one-off send to a stranger, WeTransfer is less setup for the same recipient experience.

8. AI Emaily — the mail client around the sending, not the transfer itself#

The honest placement first: AI Emaily is not on this list to sell you a file host, because we do not run one. We build AI Emaily, an AI-native mail client for Gmail, Microsoft 365 and Outlook, and standard IMAP accounts. The same 25 MB Gmail ceiling and 150 MB Exchange ceiling that apply to Gmail's web UI apply to us — they are enforced by the provider, not by the client. If your job is "get a 2 GB file to a client," a tool above us on this page is what does that job. Ranking ourselves first here would be the category error a reader who understands the stack catches in ten seconds.

What we do that is adjacent: when you send an oversized attachment from AI Emaily, the same Gmail-to-Drive or Outlook-to-OneDrive link fallback the provider offers still fires, because we use those provider APIs. Where the client adds value is around the send itself — the AI drafts the message that goes with the transfer link in the sender's voice from a user-set Context brain and per-client profiles, remembers which client wants files posted to a specific shared folder versus a WeTransfer link, and treats the follow-up ("did you get the file?") as a first-class thread the agent can chase, not a manual reminder in your head.

Packaging is a 7-day free trial on Pro or Autopilot — card required, $0 if cancelled before day 7 — not a permanent free tier. Verify the current terms on our /pricing page before signing up. And if the entire problem you are solving is "move a large file," pick a real transfer service above; the mail client wrapped around it is a separate purchase.

How to choose for your situation#

Match the primary constraint first, then the recipient. Trying to evaluate all eight options at once is how people end up with a Google Drive share they cannot fix when the recipient hits a permission wall on Friday night.

Frequently asked questions#

The questions people ask most when their attachment just bounced — the real limits, the honest workarounds, and where each tool actually fits.