What we replace

The tools you rent, rebuilt as software you own.

We don't rebuild tools one by one. We build one system that does the same jobs, shaped to your business and owned by you.

Ryan Sri

Founder · ZeroSub

SaaS and AI product expert who helps businesses replace bloated SaaS stacks with custom AI-built tools, shipped in weeks, tested and secure.

See what SaaS costs you

Built, not rented

Custom software that replaces your SaaS stack

CRM

Leads, deals and customers tracked in a system built around your pipeline, not a generic template.

Sales tools

Quoting, follow-ups and pipeline reporting in one place, tuned to how your team sells.

Marketing

Campaigns, content and lead capture run from your own system, not a per-seat platform.

Helpdesk and support

Tickets, queues and customer history, shaped to your process, with no per-agent fees.

Scheduling and booking

Bookings, calendars and reminders built into your workflow, not bolted on as another tool.

Dashboards and reporting

Your numbers in one view, from your own data, with no per-seat BI fees.

Accounting and invoicing

Quotes, invoices and approvals automated and owned, so the admin runs itself.

HR and onboarding

Records, onboarding and leave in one owned system, not a per-employee subscription.

Comms and collaboration

Shared channels and updates built into the system your team already works in.

File storage and documents

Your files and records in your own system, not scattered across rented drives.

Internal tools and automation

The spreadsheets, workarounds and Zapier chains you rely on, rebuilt as software you own.

We don't replace these one by one. We build the ones you need into a single system you own.

At your pace

You don't replace everything at once

Replacing your whole stack sounds big. It isn't. We start with one tool and grow from there.

01

Start where it hurts most

We begin with the priciest or most painful tool, so you feel the win first.

02

Own more over time

Each build plugs into the same system, so nothing you've paid for is wasted.

03

Keep what still works

Custom isn't for everything. When renting a tool makes sense, we'll tell you.

No big rebuild, no risky switch. Just one less subscription, then another.

Frequently asked questions

What replacing your stack actually looks like.

Do you replace every tool one by one?

No. We build one system that does the same jobs your separate tools do today, shaped to your business, so you own one thing instead of renting many.

Do I have to replace my whole stack at once?

No. We start with the priciest or most painful tool and grow from there. Each build plugs into the same system, so nothing you've paid for is wasted.

What if a tool is genuinely worth keeping?

Then keep it. Custom isn't for everything. When renting a tool still makes sense, we'll tell you and build around it.

Do I actually own the software?

Yes. It's your software and your data, running on infrastructure you control. No per-seat fees, and no licence that disappears the moment you stop paying.

Will it work with the tools we already use?

Yes. We connect to the systems you keep, so the new software fits into how you already work instead of forcing a rip-and-replace.

How long does it take?

Most first builds ship in weeks, not months, because we start with one focused tool rather than rebuilding everything at once.

Let's find the first tool worth replacing.

Ryan Sri

Founder · ZeroSub

SaaS and AI product expert who helps businesses replace bloated SaaS stacks with custom AI-built tools, shipped in weeks, tested and secure.

Today3 - 4 tools

Year 1More seats

Year 2More subscriptions

Year 3More workarounds

FutureCompounding costs