Software Alternatives & Startups

Resend VS Sortfully

Compare Resend VS Sortfully and see what are their differences

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Resend logo Resend

Email for developers

Sortfully logo Sortfully

Auto-file your Outlook & Microsoft 365 mail by the organisation that sent it - once you've read it. Sortfully never reads your message bodies or attachments.
  • Resend Landing page
    Landing page //
    2023-10-14
  • Sortfully Dashboard
    Dashboard //
    2026-08-31
  • Sortfully Mappings View
    Mappings View //
    2026-08-31

Sortfully is an automatic filing service for Outlook and Microsoft 365. It moves each message into an Inbox subfolder, or tags it with a coloured category, based on the organisation that sent it. By default a message is only filed once you have read it, so new mail still lands in front of you and nothing disappears unseen. If you prefer, filing can happen instantly on delivery instead.

There is no AI in Sortfully. No model, no classifier, no LLM, and your mail is never sent to any AI service. Filing runs on deterministic rules you can read and edit: the sender's domain, your exact-match overrides, then Public Suffix List normalisation, so notifications.slack.com and hello@slack.com both land in one Slack folder, and .co.uk domains get correct names. You can group several domains into one folder, pin a domain to a folder you already have, exclude senders entirely, and choose move-or-tag per organisation. Every action is reversible.

Privacy is structural, not a promise. Sortfully never reads message bodies or attachments: the one code path allowed to call Microsoft Graph message endpoints uses a strict metadata field allow-list, and a CI gate fails the build if a content field ever appears. An optional detailed audit log records the subject line so you can see exactly what was filed; you can switch it off. Sortfully connects through delegated Microsoft Graph permissions only (Mail.ReadWrite, Mail.ReadWrite.Shared, MailboxSettings.Read), is a verified Microsoft publisher, and reads your existing inbox rules without ever modifying them. Tokens are encrypted at rest and you can disconnect at any time.

Optionally, a chunked, throttle-safe backlog cleanup sorts the mail you already have, with protected folders and a leave-recent-mail window so nothing current is touched.

Sortfully is built for Microsoft 365 first: individual mailboxes, shared mailboxes, and a Business plan with team management for firms. It is operated by a UK company, hosted in the EU.

Sortfully

$ Details
paid Free Trial £5 / Monthly
Platforms
Web SaaS Outlook
Release Date
2026 August
Startup details
Country
United Kingdom
City
London
Founder(s)
Adam Harman
Employees
1 - 9

Resend features and specs

  • Ease of Use
    Resend offers a user-friendly interface that makes it easy for users to send emails without needing extensive technical knowledge or setup.
  • API Flexibility
    The platform provides a flexible API that allows developers to easily integrate email functionality into their applications, enhancing automation and customization.
  • Deliverability
    Resend focuses on high email deliverability, ensuring that emails reach recipients' inboxes rather than being marked as spam.
  • Scalability
    The service is designed to handle a large volume of emails, making it ideal for businesses that need to send bulk emails or handle growing email traffic.
  • Analytics and Tracking
    Resend provides analytics and tracking tools to monitor email performance, allowing users to optimize their email campaigns effectively.

Possible disadvantages of Resend

  • Cost
    Depending on the scale and frequency of email campaigns, the cost of using Resend could be high, especially for small businesses or individuals with limited budgets.
  • Learning Curve
    While the interface is user-friendly, some users may face an initial learning curve when adapting to its more advanced features and API integrations.
  • Feature Limitation
    Compared to some other email service providers, Resend might have limitations in terms of advanced marketing features like A/B testing or complex automation workflows.
  • Dependence on Internet
    As a cloud-based service, its effectiveness is entirely dependent on a stable internet connection, which might be a constraint in areas with poor connectivity.

Sortfully features and specs

  • Filing by sender organisation
    Mail is filed by the organisation that sent it, so every alias and subdomain from a company lands in one folder.
  • Move or tag per organisation
    Each organisation can be moved to an Inbox subfolder or tagged in place with a coloured category.
  • File after read
    By default nothing moves until a message has been read, so new mail never disappears unseen; instant filing on delivery is optional.
  • No AI
    No model, no classifier, no LLM; filing runs on deterministic rules you can read and edit, and mail is never sent to any AI service.
  • Content-Blind
    Message bodies and attachments are never read, enforced by a code-level allow-list and a CI gate, not just a policy.
  • Public Suffix list
    Public Suffix List normalisation gives correct names for .co.uk, .energy and hundreds of other endings.
  • Overrides and exclusions
    Group several domains into one folder, pin a domain to an existing folder, or exclude senders entirely; your rules always win.
  • Backlog cleanup
    Sorts the mail you already have in chunked, rate-limited passes, with protected folders and an option to leave recent mail in place.
  • Undo anything
    Every filing action is recorded and reversible from the dashboard or audit log.
  • Audit Log
    A record of every filing with sender, destination and mode; a detailed option records the subject line and can be switched off.
  • Shared Mailboxes
    Files shared mailboxes a delegate has access to, alongside personal ones.
  • Team Management
    The Business plan adds team management for firms running multiple mailboxes with multiple users.

Resend videos

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Category Popularity

0-100% (relative to Resend and Sortfully)
Email Marketing
100 100%
0% 0
Inbox Management
0 0%
100% 100
Email
100 100%
0% 0
Email Automation
0 0%
100% 100

Questions & Answers

As answered by people managing Resend and Sortfully.

Why should a person choose your product over its competitors?

Sortfully's answer:

Most email organisers ask you to trust them: an AI classifier scores your mail and a privacy policy promises restraint. Sortfully is built so you don't have to take its word for it. It cannot read message bodies or attachments; the restriction is a code-level allow-list backed by a CI gate that fails the build, and filing runs on deterministic rules you can read and override. It is also the only one of its kind built for Outlook and Microsoft 365 first: delegated Microsoft Graph permissions from a verified Microsoft publisher, shared mailbox support, and read-only respect for your existing inbox rules, where SaneBox, Clean Email and Mailstrom treat Outlook as a second platform. And it behaves differently: mail is filed by sender organisation, so every alias and subdomain lands in one folder, and by default only after you have read it, so nothing disappears unseen and everything can be undone.

What's the story behind your product?

Sortfully's answer:

Sortfully was built by a UK founder who watched Outlook rules fail at scale: Exchange caps rules at 256 KB, one rule per sender domain does not scale, and rules only run while Outlook is open. The alternatives all wanted AI access to mail content, which is exactly what regulated firms cannot accept. So Sortfully does the opposite: deterministic filing by sender organisation, with a code-enforced guarantee that message bodies and attachments are never read. It launched in August 2026, operated by a UK company with EU hosting.

What makes your product unique?

Sortfully's answer:

Sortfully contains no AI at all. Filing runs on deterministic rules you can read and edit: the sender's domain, your overrides, then Public Suffix List normalisation. And the privacy guarantee is structural rather than promised: the one code path allowed to call Microsoft Graph message endpoints uses a strict metadata allow-list, and a CI gate fails the build if a content field ever appears. Message bodies and attachments are never read.

How would you describe the primary audience of your product?

Sortfully's answer:

Businesses and normal consumers can both benefit from Sortfully. Businesses on Microsoft 365, mainly professional services firms of 10 to 200 mailboxes (accountants, solicitors, surveyors, architects) and the IT admins or MSPs who manage their tenants. It also suits compliance-conscious firms that have decided against AI email tools, and individual Outlook power users.

Which are the primary technologies used for building your product?

Sortfully's answer:

Laravel (PHP), PostgreSQL and Redis on the backend; React with TypeScript and Inertia on the frontend; the Microsoft Graph API with delegated permissions for all mailbox access. Hosted in the EU.

User comments

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Social recommendations and mentions

Based on our record, Resend seems to be more popular. It has been mentiond 42 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Resend mentions (42)

  • Punk: Fully Authed
    This guide builds one application with all of those doors on it, from punk new to a passing test suite, using four pieces of the Punk ecosystem: Punk::Auth for the identity and the single-use tokens, Punk::Plugin::Mailer to send the tokens through Resend, Punk::Plugin::TOTP for the second factor, and Punk::Plugin::OAuth2 for GitHub and Google. - Source: dev.to / 18 days ago
  • I Built an Open-Source project. It Became the Official MailChannels JS SDK
    What started as a small Nuxt integration eventually became a full Node.js and TypeScript SDK for MailChannels. Along the way, I learned a lot from the Vue, Nuxt, and UnJS ecosystems, took inspiration from other developer-focused tools such as Resend, and eventually had the opportunity to join MailChannels and get the project adopted and officially maintained. - Source: dev.to / 27 days ago
  • Getting Your Writing Seen Beyond Your Own Site
    Two practical pieces. First, you need a transactional sender that can do broadcasts. I use Resend because the API is good, the React Email integration is good, and the dashboard is sane. Postmark and AWS SES work fine too. Second, on every publish, send a broadcast to your audience. This is the closest thing you have to a guaranteed reader. - Source: dev.to / 3 months ago
  • How to Send Transactional Emails with Vue and Resend
    Resend has quickly become the default way to send email from modern applications. The API is clean, the deliverability is good, and the developer experience is impressive. But Resend only handles sending emails. It provides a html field and you produce the HTML that you've ensured is compatible with Gmail, Outlook, and the many other email clients. - Source: dev.to / 3 months ago
  • Adding comments to a static Astro blog with Netlify Forms
    Netlify/functions/comment-handler.js is triggered by a Netlify outgoing webhook Whenever a new submission hits the blog-comments queue. It sends an HTML email Via Resend (the same delivery layer used for new post notifications) containing the comment text and two HMAC-SHA256-signed action links:. - Source: dev.to / 4 months ago
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Sortfully mentions (0)

We have not tracked any mentions of Sortfully yet. Tracking of Sortfully recommendations started around Aug 2026.

What are some alternatives?

When comparing Resend and Sortfully, you can also consider the following products

Postmark - Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.

Sanebox - SaneBox is a cloud-based service that allows users to filter and manage their emails.

Loops.so - We bought a billboard in Times Square and we're letting you advertise your startup on it!It's free.

Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.

Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Mailstrom - The smarter, faster way to clean out your inbox. Power through thousands of messages in just a few clicks. Free Trial! Website. JOBS.