Softwr

All industries · head to head

Slack vs Stampli

Slack logo

Slack

All industries

Where work happens

From
Free
Rated
-
Full reviewWebsite
Stampli logo

Stampli

Accounting & Finance

AI-powered accounts payable automation

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Only Slack has a free tier, so it costs nothing to try first.
  • Each has a real cost: Slack 90-day message history limit on free plan results in important conversations disappearing; Stampli pricing is by quote only: the pricing page publishes no rate, no minimum and no cost driver, offering only a Request a Quote form
  • They diverge on capability: Slack covers Channels, Stampli covers AI invoice processing.

Where they differ

Only the attributes on which Slack and Stampli actually diverge.

Attributes where Slack and Stampli differ
AttributeSlackStampli
Starting priceFree$29/month
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsWeb, iOS, Android, macOS, Windows, LinuxWeb, Ios, Android
CategoryAll industriesAccounting & Finance
Founded20092014

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Slack

  • Channels
  • Direct messaging
  • Voice & video calls
  • Screen sharing
  • File sharing
  • Search
  • Workflow builder
  • Slack Connect

Only in Stampli

  • AI invoice processing
  • Approval workflows
  • Vendor management
  • Payment processing
  • Audit trails
  • NetSuite
  • Sage Intacct
  • QuickBooks

What people use each for

The jobs each tool is most often brought in to do.

Slack

  • Team communicationnot Stampli
  • Project coordinationnot Stampli
  • Customer supportnot Stampli
  • Remote worknot Stampli
  • Cross-functional collaborationnot Stampli

Stampli

  • Automating accounts payable invoice capture and codingnot Slack
  • Routing invoice approvals with discussion held against each invoicenot Slack
  • Paying suppliers and issuing virtual cards from the AP workflownot Slack

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Slack

  • 90-day message history limit on free plan results in important conversations disappearing
  • Per-user pricing becomes expensive quickly for larger teams
  • Notification overload with 78% of employees feeling overwhelmed by notifications
  • Mobile app performance issues including lag and slow syncing
  • Huddles limited to 50 people and cannot be recorded
  • Requires dedicated video conferencing service for formal meetings and webinars

Stampli

  • Pricing is by quote only: the pricing page publishes no rate, no minimum and no cost driver, offering only a Request a Quote form
  • Payments and card products are sold alongside the core AP automation rather than being separately priced on the public site

Pricing, plan by plan

Slack

Free

No published plan breakdown. See the Slack review.

Stampli

$29/month
  • Essential$undefined/month
    • Invoice processing
    • Basic approvals
    • Email notifications
  • Professional$undefined/month
    • AI-powered coding
    • Advanced workflows
    • ERP integrations
  • Enterprise$undefined/month
    • Custom workflows
    • API access
    • Dedicated support

Which should you pick?

Choose Slack if

  • You need channels.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows, Linux.
  • You also want direct messaging.
Slack review

Choose Stampli if

  • You need ai invoice processing.
  • You work on Web, Ios, Android.
  • You also want approval workflows.
Stampli review

Questions people ask

Is Slack or Stampli better?
Neither clearly leads. Slack starts at Free and Stampli at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Slack or Stampli?
Slack has a free tier; the other does not. Paid plans start at Free for Slack and $29/month for Stampli.
Does Slack or Stampli run on more platforms?
Slack runs on Web, iOS, Android, macOS, Windows, Linux. Stampli runs on Web, Ios, Android.
Can I use Slack for free?
Yes. Slack has a free tier, so you can try it without paying. Stampli starts at $29/month.
What is Slack best used for?
Slack is most often used for team communication, project coordination, customer support, remote work. Of those, team communication and project coordination are not what Stampli is typically brought in for.
What can Slack do that Stampli cannot?
Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing. Stampli covers AI invoice processing, Approval workflows, Vendor management, Payment processing.

Answered from the vendors’ own pages

Slack: Does Slack have a free plan?

Yes, Slack offers a free plan indefinitely with no credit card required. Free users get 90-day message history, up to 10 app integrations, and 1:1 huddles.

Source
Slack: What are Slack's pricing plans?

Slack offers Free, Pro ($7.25/user/month with annual billing), Business+ ($12.50/user/month), and Enterprise Grid (custom pricing). Monthly billing costs approximately 20% more than annual.

Source
Slack: Does Slack support offline use?

Slack is a cloud-based platform and does not support robust offline work. Internet connectivity is required to access messages and collaborate.

Source
Slack: What integrations does Slack support?

Slack integrates with 43+ apps on average per team, including Google Drive, ChatGPT, Vercel, Asana, GitHub, and many others through their app marketplace.

Source
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Related pages

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