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What is Trello?
Blog →
by
Luis Manjarrez
September 15, 2020
· Updated on
Sometimes a to-do list is not enough to accomplish your objectives.
More often than not, you need a more structured approach. This is where tools like Trello are of great help. Trello is a web-based app that lets you create cards with lists in a Kanban-style to manage projects.
Kanban is a method of organizing work. It's a visualization format in which cards (digital or not) are spread over a board. Each card contains a task or action. Cards are distributed in different lists in categories of progress: To-do, doing, and done. Boards can be customized to hold different degrees of progress granularization.
Trello uses the kanban lean methodology to help people plan and execute projects of all sorts via their application. Trello boards are very popular. Some companies, organizations and communities leave them public for everyone to watch, like the super popular videogame Project JoJo Trello or this company's roadmap.
Short story long, yes, you can with Missive.
Missive is a team inbox and chat app that helps businesses stay on top of all their communication channels and projects in a single app. All while enabling collaboration between coworkers. Missive offers a Trello integration that helps you bridge the gap between emails and projects!
The integration gives you access to all your boards, lists, labels, cards, and teammates. You will be able to add cards, apply labels, move cards to lists, add teammates, and define due dates. Say good buy to switching between apps to add tasks to your project.
A customer sent an email with a change request to the project? Easy, click on New Card on Missive, and the whole team will see the new task and begin to work immediately.
Do you need to discuss a card in real-time? No problem, you can do that too!
Create a free Trello account.
They offer multiple sign up options, like Gmail sign in for example, or you can do it with an email and password. Once that's done, you will need to create your first project or board, then add a few cards and you're done!
Open Missive and go to Settings > Integrations > Add integration > Trello
A pop-up will open that will ask for your Trello account and permission to access it.
Share the integration with your team if needed.
You're ready to start creating and managing cards from Missive! Click on the "New Card" button in the integrations panel.
Enter the card's information and click on Create:
Yes! Everything you create or edit in Missive will be visible and available in trello.com in real-time.
September 16, 2025
The 6 most secure email clients for collaborative teams
We looked at 6 of the most popular email clients for teams on the market, and scored them on 6 criteria: security hygiene, auditing & accountability, access, removal, and sign-in controls, privacy & data handling, external verification, and data residency.
There are lots of secure email clients on the market—Tutanota, ProtonMail, StartMail. But many of these fail to have the helpful collaborative features of more modern business email clients. Where you can have internal comments, real-time drafting, powerful automations, all in an intuitive interface.
Tutanota - Tutanota is a top tier secure email provider. It offers end-to-end encryption, send encrypted emails, but zero collaborative functionality or third-party integrations.
ProtonMail - ProtonMail is a close competitor to Tutanota. It allows you to send password-protected encrypted emails, open source mobile apps, but no collaborative features.
StartMail - StartMail is another secure email provider. It offers local storage with ISO 27001 certified data centers and out of the box phishing and spam protection, but like the other two options, it has little collaborative functions.
If you just need a few shared labels, email aliases, and calendars to make your team more productive, then any of these options would work great. But if you often have multiple team members working on email threads and/or high volumes of emails that need to be coordinated amongst multiple people—you'll want to look into true collaborative email clients.
If you rely on email for your business and you work with sensitive information, you'll want to know which of these shiny collaborative email clients have robust security and privacy standards underneath the hood.
Note: If you require a very high level of privacy like PGP, you're better off with one of the traditional options (i.e. Tuta) or Mailfence/Posteo/Zoho Mail for small businesses. But if PGP and full end-to-end encryption is not required, then keep reading on...
We looked at 6 of the most popular email clients for teams on the market, and scored them on 6 criteria:
As a benchmark, we compared each of them to the gold standard of secure email providers and email security—Outlook/Microsoft 365.
Let's get into it.
Outlook is the most popular email service and email client for enterprises, especially those who deal with sensitive client information over email. Outlook has unmatched configuration options and incredibly detailed auditability.
Auditability is particularly important for professional industries like healthcare, finance, and public sector companies which have recording keeping requirements by law. Here's Outlook's score:
Bottom line: There's a reason why Outlook is the email service of choice for enterprises. Now, if only they could do collaboration well.
Missive is a collaborative inbox designed for teams that supports all email service providers, including IMAP accounts. While it doesn't offer end-to-end encryption, it does have very high security standards, auditability, and external verification.
Price: Starts at $14/user/month, paid annually.
Bottom line: Missive checks the boxes that most teams look for (SSO, SOC 2, TLS encryption) and is clear in public docs. Audit depth & residency options aren’t M365-level, hence the gap.
Superhuman is a productivity-first email service build for high volume inboxes who loves shortcuts. It offers less collaboration functionality than others on this list, but it shines on it's access/removal functionality. By default, Superhuman does insert a pixel in all emails for it's read receipt feature, that might be a privacy concern for some.
Price: Starts at $25/user/month, paid annually.
Bottom line: If you already run Okta/Entra and need fast onboarding/offboarding, Superhuman’s Identity and Access Management system is excellent. Balance that with the privacy policy’s scope.
Hiver started is the Gmail-only option on this list. It has a a lot of the collaborative email functions like Missive but most of their customers use it as an alternative to a help desk. Here's how they rank from a security perspective:
Price: Starts at $19/user/month, paid annually.
Bottom line: If your priority is “don’t duplicate email content in another vendor,” Hiver is attractive for Google Workspace shops.
Shortwave is the most AI-forward email service on this list. They don't excel at any security standard compared to the other options, but they're a good middle ground option if you're looking for some thing with a lot of AI functionality and you're not required to have solid audit logs.
Price: Starts at $24/user/month, paid annually.
Bottom line: Great in Google-first orgs, but if you need audit trails for compliance/forensics for your industry, you'll probably want a different option.
Spark is used by individuals and teams. They offer a familiar interface with some collaboration functionality, though they are the lightest security option on this list.
Price: Starts at $4.99/month for individuals and $6.99/user/month for teams, paid annually.
Bottom line: Individual teams that want a polished client and understand the implications of server-side features for notifications/scheduling.
Tuta, ProtonMail or even Zoho Mail has a lot of the enterprise-grade security features (encrypted mail, PGP, etc) right out of the box, but the collaborative-first email clients we mentioned here might be able to meet your security standards with a little custom development. For example, you can feed all of the data/comms out to a third-party compliance service to make sure you hit the regulatory requirements.
At the end of the day, it'll depend on what trade offs you're willing or unwilling to make. Most businesses want some level of security but also usability and collaboration. How much of each will depend greatly on your use case.
Which of these options offer end-to-end encryption and encrypted emails?
Short answer is none. While most of these options have some form of encryption, the higher scoring ones are encrypted via TLS at rest and in transit, but none of them offer the same level of encryption features as Tuta or ProtonMail.
Is Outlook “more secure” than these tools?
It’s more controllable out of the box—especially for audit, labeling/IRM, and data residency. That’s why we use it as the baseline. Your best option is the one that fits your constraints and is configured well.
Do these tools read my emails?
Policies differ. Some tools process email content to power features (e.g., read receipts, scheduling, AI summaries). Some store only metadata. Always confirm what’s stored and for how long.
Are there other options with different encryption options?
If you're primarily looking for encryption features, but don't want to go with your standard Tuta, then you might want to check out Zoho Mail, Mailfence, or Posteo. The latter options offer OpenPGP end-to-end encryption and the former is basically enterprise level controls that isn't Outlook.
May 21, 2025
Collaborate beyond your team: Guest Access is here
We designed Guest Access for anyone you occasionally collaborate with (think your accountant, a third-party vendor, seasonal workers, etc).
Remember the first time you @mentioned a teammate below an email, instead of forwarding it to them?
That’s a magical moment for many Missive users.
It’s when they realized email can be collaborative without creating more email.
Starting today, with Guest Access, you can give that same experience to anyone you work with — even if they’re not on your team.
Guest Access makes it easy to bring people outside your organization — like an accountant, contractor, or client — directly into specific Missive conversations.
No more forwarding long threads. No more stitching together feedback from different tools. Just real-time chat alongside the emails that matter.
Here’s how it works:
Your guest will get an email with a link to join. Once they create a free Missive account, they’ll land directly in the conversation you invited them to.
They’ll be able to read the full message history and reply via chat — but not email, tasks, or assignments. Just focused, limited access.
Guest Access is included in all Missive plans. No add-ons. No hidden costs.
Each team member can invite up to 5 guests, and each guest can access up to 5 conversations.
That means if your team has 10 users, you can collaborate with up to 50 guests across 250 guest-enabled conversations — all for free.
We designed Guest Access for the people you don’t work with every day, but still need to collaborate with effectively — without paying for a full seat or dragging another tool into the mix.
If you’ve ever said:
I wish this person could just see this conversation—now they can.
Guest Access isn’t just for external vendors or partners. If you have teammates who don’t need full Missive functionality every day, Guest Access is a perfect lightweight option. No need to buy a full seat just to loop someone in occasionally.
By default, any team member can invite guests. But admins can manage this in:
Settings → Guests → Allow guest invitations
You can:
Want tighter control? You can restrict guest invitations so only admins or the org owner can send them. That way, access stays centralized and intentional.
Guests can:
Guests cannot:
This keeps their access simple, focused, and secure.
Admins can see which guests are active and what they have access to. If you need to invite new guests but hit your limit, you can quickly revoke access from inactive ones to free up slots.
We can’t wait to see how you use Guest Access.
Whether you’re looping in a freelance designer, a tax advisor, or just a teammate who doesn't need a full Missive seat — Guest Access gives you the power to collaborate where the conversation is happening.
Try it today and let us know what you think!
Can guests see the full history of the conversation?
Yes. Guests can view the entire message and chat history of any conversation they’re invited to.
Can guests reply to emails or send new ones?
No. Guests can only send chat messages. They cannot interact with the email side of the conversation.
Can guests be assigned to tasks or create tasks?
No. Guests don’t have access to task-related features in Missive.
Can guests @mention team members?
Yes. Guests can use @mentions in the chat area of the conversation to address specific people already present in the conversations. They can’t @mention people not present in the conversation.
What happens if I remove a guest from a conversation?
They will instantly lose access to that conversation and all its content.
Can I re-invite someone after removing them?
Absolutely. You can revoke access at any time and re-invite them later if needed.
Can I upgrade a guest to a full team member later?
Yes. If someone needs broader access, you can always add them as a regular user by assigning them a seat.
What if my guest has their own Missive organization?
They will be able to access the conversation(s) that you granted them, from their existing Missive interface. It will be treated like any other conversation.
