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Slashy vs Spark

Spark keeps your inbox calm. Slashy keeps it moving.

Spark keeps the inbox tidy with reminders and a calendar. Slashy starts there and does the work: the reply drafted from your meetings and CRM before you open the thread, the replies you owe found for you, and the whole inbox runnable by text from your phone.

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7 day trial · credit card required · cancel any timeBacked by Y Combinator

Slashy vs Spark

Comparison based on publicly available product information (sparkmailapp.com) reviewed October 9, 2026. Features and pricing may change.

Spark
Smart inbox and categorization
Calendar beside the inbox
Reminders and Send Later
AI writing in your voiceSpark offers an AI writing assistant on paid plans. Slashy drafts on every plan, from your sent mail and your edits.Paid tier
Drafts grounded in your CRM and meeting notesSlashy pulls the CRM record and your last meeting into the draft.
Replies you owe, detected automaticallySpark reminds you about what you flag. Slashy finds the threads waiting on you by itself.
Control from iMessage and Slack
Meeting prep and VIP alertsA brief before every meeting, and a ping when someone who matters writes.
Open tracking
Attio, HubSpot, and Salesforce
Windows appSpark has a Windows app today. Slashy runs on Mac, web, and iOS, with Windows coming soon.Coming soon

Where a tidy inbox stops and Slashy keeps going

The reply is waiting when you open the thread

Slashy drafts in your voice from the meeting you just had, the CRM record, and your past threads with this person. You read, edit if you want, and send.

Gavin Belson gavin@hooli.com
Acquisition Offer for Pied Piper
Your middle out algorithm is impressive. Hooli is prepared to offer $10 million for Pied Piper. This is a rare opportunity, Richard.Gavin BelsonCEO | Hooli
InterestedNeed more detailsNot interested

Before we proceed, I’d need to understand how this affects our IP and the team.

Send

Nobody waits on you without you knowing

Reminders only cover what you remembered to flag. Slashy finds every thread waiting on your reply and every one gone quiet on their side, ranked by urgency.

Replies you owe
Sarah ChenQ4 budget reviewUrgent3d
Mike TorresIntro to the Redpoint teamDue today1d
Acme LegalSigned contract attachedWaiting on them2d

Run it from your phone

Slashy pings you when something matters, and you can text back to draft, send, or schedule from there.

I see you’re still in the 10:00 meeting with Mike, want me to let Jane know you’re gonna be late? yea sg, emailed her btw, she also went to GT, could be good to bring up :)

Handle your inbox from iMessage

  1. 01.Tell Slashy what you need

    Ask for a reply, a summary, or a follow up in plain language.

  2. 02.Slashy handles it in your inbox

    It finds the right thread, uses the full context, and sends the finished draft back in iMessage.

  3. 03.Review and approve

    Get the result by text, request changes, or send it without opening email.

Find Monica’s last email, draft a reply confirming Thursday at 10:00 AM, and attach the Pied Piper deck.
Found Monica’s thread. I’m using the full conversation to draft the reply.
Done. I used your last Raviga thread for context and attached the Pied Piper deck.
From:richard@piedpiper.comTo:monica@raviga.comCc:laurie@raviga.comHi Monica, Thursday at 10:00 AM works. I attached the Pied Piper deck.SendSend later
Want me to send it, or change anything first?
Send it
Sent.

Built for people who live in email

Shortcuts, scheduling, integrations, tracking, and team tools are built into the same intelligent inbox.

Bring your inbox into the AI tools you use
Slashy MCPBring your inbox into the AI tools you use
Book meetings from the thread
SchedulingBook meetings from the thread
Connect the tools around your inbox
IntegrationsConnect the tools around your inbox
Set labels in plain English
Smart labelingSet labels in plain English
Every keyboard shortcut you expect
Power toolsEvery keyboard shortcut you expect
Know when your message lands
Recent opensKnow when your message lands
See every inbox in one calm view
Unified inboxSee every inbox in one calm view
Bring your team into any thread
Team commentsBring your team into any thread

“Founders remember who got back to them first. Now I'm always that person.”

Priscilla RussoPriscilla RussoInvestor, Redpoint

Choose the plan that fits how you work

ProfessionalFor founders and growing teams that need one intelligent inbox across every account.
$25/user/mo.$30$300 billed annually
$30/user/mo.billed monthly
  • Intelligent drafts and rewrites
  • Multiple inboxes and calendars
  • Automations and reminders
  • iMessage, Slack, voice, and mobile access
Get started Get started
EnterpriseFor larger organizations that need advanced security, controls, and support.
CustomTailored to your organization
  • Everything in Professional
  • SSO and SCIM
  • Guided team onboarding
  • Custom security and data controls
Talk to sales

7 day trial · credit card required · cancel any time

Built with security from the ground up

Your data is encrypted, never used to train AI models, and protected by independently audited controls.

Encrypted in transit and at rest

Your data is encrypted in transit with TLS 1.2+ and at rest with AES 256 encryption.

SOC 2 Type II

Independent auditors evaluate our controls against the AICPA Trust Services Criteria for security and confidentiality.

No training on your data

Your emails are never used to train models. Our agreements require AI providers not to retain them.

Questions & answers

Does Slashy keep my inbox organized like Spark?
Yes. Slashy sorts incoming mail by importance into tabs, with one All view across every account, and then acts on top: drafting replies and tracking the ones you owe.
Which accounts and platforms does Slashy support?
Slashy works with Gmail, Google Workspace, Outlook.com, and Microsoft 365, on web, desktop, and iOS. There is a native Mac app, a fast web app, and a native iOS app, with Windows and Android coming soon.
How long does it take to switch?
Connect Gmail or Outlook with your existing sign-in and Slashy starts working. Nothing moves and nothing is migrated.
What does it cost?
Slashy is $30 a month, or $25 a month billed annually ($300 a year), for unlimited usage. The 7 day trial includes every feature, requires a credit card, and can be canceled any time.
Is my email data safe?
Yes. Slashy has completed a SOC 2 Type II audit and encrypts data in transit and at rest. Your email is never used to train AI models, and you can revoke access anytime.

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