Every tool your business runs on, free forever, unlimited users.
Stacks
Start free →
PlatformPricing FeaturesCompareFAQBlog Log inStart free →
NEW One platform · seven tools · $0

Every tool your business runs on. One platform. Actually free. For real.

Stacks replaces your CRM, email marketing, reviews, invoicing, scheduling, support desk, and time tracking, in one simple platform. Free forever, with 50 one-time AI credits. AI Pro lets you continue using AI and adds priority support when you need it.

Start free → Take the tour
✓ No credit card  ·  ✓ Unlimited users, no per-user fees  ·  Free forever

Common business workflows

CRMContacts and deals
EmailCampaigns
ReviewsCustomer feedback
InvoicingInvoices and payments
SchedulingBookings
SupportTickets
TasksFollow-ups and time
Compare your actual subscriptions, calculate your costs
→
FREE FOREVER
$0
per month · unlimited users
  • All seven tools included
  • One shared customer record
  • No per-user fees, ever

Start with one client follow-up

Built for solopreneurs: keep track of sales opportunities, email your customer list, bill for your time, and send invoices with a $0 Stacks subscription. Start with one test contact and a follow-up.

1. Save a contact

Add a test contact so the person and their details have one place to live.

Add your first contact →

2. Complete a follow-up

Create a task linked to that contact. Do the work, then mark the task complete.

Manage follow-up tasks →

3. Keep the next action

Add a note to the contact timeline with what happens next. Reopen the contact to check that your note and completed activity are there.

Use the contact timeline →

Then explore sales opportunities, customer emails, billable time, and invoices.* Start free, with no card required.

One login instead of seven

Which business tools are included?

Each of these is a full product on its own. Together, they share one contact list, one inbox, one login, and they all talk to each other.

Sales CRM

Pipeline, deals & contacts.
Replaces Pipedrive, HubSpot, Zoho

Email Marketing

Campaigns, sequences & lists.
Replaces Mailchimp, Klaviyo

Reviews

Collect & manage reputation.
Replaces Podium, Birdeye

Invoicing

Invoices, estimates & payments.
Replaces FreshBooks, Zoho

Scheduling

Bookings & availability.
Replaces Calendly, Acuity

Support Desk

Tickets & help center.
Replaces Intercom, Freshdesk

Tasks & Time

To-dos & time tracking.
Replaces Productive, Toggl

All connected.

One contact record, seven lenses. A lead becomes a customer becomes an invoice, without re-typing anything.
ML
Maria Lopez
Bloom Salon & Spa
LEAD → CUSTOMER → REGULAR
💰 $2,400 deal won · invoice paid 📅 Next appointment Tue 10:30 ⭐ Left a 5-star Google review
CRMDeal won
EmailOpened 3 campaigns
InvoicingPaid $2,400
Scheduling12 bookings
Reviews★★★★★
Support0 open tickets
TasksFollow-up done ✓
One shared record

Meet Maria. Every tool already knows her.

In a normal business, Maria lives in seven databases that don't talk. In Stacks, she's one record: and every module is just a different lens on it.

  • ✓
    No re-typing, no syncing. Win the deal and the invoice, booking and follow-up already know who she is.
  • ✓
    Nothing falls through the cracks. Her emails, payments, appointments and tickets share one timeline.
  • ✓
    Context everywhere. Pull up Maria from any module and see the whole relationship, not a fragment.
Take the full tour, follow Maria through every tool →
Do the math

What does your current setup cost?

Compare the tools you use, your own seat counts and the prices you actually pay. Stacks subscription prices stay separate from email, SMS and payment-provider costs.

Compare your costs →

CRM shopping? See HubSpot Free and Pipedrive alternatives.

✦ Included in AI Pro

Meet the AI teammate that never clocks out

✓
Writes your emails & follow-ups , on-brand, in seconds.
✓
Scores & prioritizes leads , so you call the right ones first.
✓
Drafts review replies , responds to every customer, fast.
✓
Reads invoices & receipts , turns a photo into a record.
✓
Answers questions about your numbers , just ask.
Draft a friendly follow-up to Dana about the roofing estimate.
Hi Dana! Just following up on the estimate we sent Tuesday, happy to walk through the options whenever works. Want me to hold your preferred start date? 🙂
✦ Drafted by Stacks AI · ready to send
Simple pricing

Free forever.
AI Pro when you're ready.*

The core platform is free with no credit card and no per-user fees, ever. Free includes 50 one-time AI credits. After those are used, upgrade to AI Pro to continue using AI, get priority support, and remove Stacks branding from customer-facing pages.

Free

$0 / forever
Everything a small business needs to run.
  • All 7 modules, unlimited
  • Unlimited users: no per-user fees
  • Your own subdomain
  • Contacts, deals, invoices & bookings
  • Email marketing & reviews
  • 50 one-time AI credits, shared across the workspace
  • “Powered by Stacks” on invoices, bookings, emails, and embeds
Start free

AI Pro

$99 / mo
or $995/year (~16% off) · still unlimited users · everything in Free, supercharged.
  • Continue using AI after your Free credits are used
  • No Stacks branding
  • Priority support
  • Submit & vote on feature requests
  • Early access to new tools
Upgrade to AI Pro →

Coming soon. Agentic. Autonomous agents that do the work for you, not just help you do it. Join the waitlist →

Grow with us

Need a workflow beyond the standard setup?

We can extend Stacks with specialized workflows, data attributes and integrations. Discovery defines the implementation, migration needs, maintenance and any custom-code ownership before work begins. Free and AI Pro provide hosted Stacks access, not ownership of its platform code or infrastructure.

Talk to us →
Questions

The obvious questions, answered

Yes. Really. The full platform, all seven tools, with unlimited users, is free forever. Customer-facing pages show a small “Powered by Stacks” mark. Free includes 50 one-time AI credits. AI Pro removes the mark and lets you continue using AI, with priority support. Stacks Custom is available by scoped enquiry. No ads, no selling your data, no per-user fees. Read the full story: Why is Stacks free? →

Correct. Add your whole team (3 people or 300) at no extra cost. Per-user pricing is the single biggest way tools like Pipedrive, Calendly and Intercom quietly run up your bill. We don't do it.

Stacks supports contact CSV import. Review the mapped columns before importing. Other records and tool-specific migration need separate scoping. Contact exports have documented coverage and limits.

Everything in Free, plus no Stacks branding on invoices, booking pages, emails, and embeds, continued AI use across supported features (drafting emails, scoring leads, replying to reviews, reading invoices, answering questions about your numbers), priority support, and the ability to submit and vote on feature requests, $99/mo or $995/yr, still unlimited users.

Free includes 50 one-time AI credits. AI Pro lets you continue using supported AI features after those credits are used:
  • Writes your emails & follow-ups: on-brand, in seconds
  • Scores & prioritizes leads: so you call the right ones first
  • Drafts review replies: responds to every customer, fast
  • Reads invoices & receipts: turns a photo into a record
  • Answers questions about your numbers: just ask
  • More coming soon.

Our team can extend Stacks or build an integration for specialized work. Discovery defines scope, migration, training and maintenance. Discuss your workflow.
Guides & how-tos

Explore everything Stacks can do

Short, practical guides for setting up and getting the most out of every feature.

Import your contacts → Send an email campaign → Request customer reviews → Create & send invoices → Set your availability → Open support tickets → Track & bill your time → Turn on AI features → Build an automation →
Browse all feature guides →

One platform. Every tool. Free.

Every tool your business runs on, free forever, unlimited users, no per-user fees.

Start free →