What does Sastrify do in one sentence?

By its public shape it is a SaaS procurement platform: it centralizes purchase requests, runs vendor negotiations with price benchmarks, tracks renewal dates and contracts, and helps optimize license counts after the deal. Its value grows with the number of purchases that pass through it.

Why does a procurement process need an inventory first?

Because a process only covers what enters it. A card-click purchase, a trial that converted on a personal account, or an app-store subscription never files a request, so the platform never sees it. The inventory is the list of everything that bills, including the purchases the process missed.

Do Sastrify and a mailbox inventory overlap?

Partly. Sastrify holds the purchases and contracts that went through it, which is exactly right for anything negotiated. A mailbox inventory covers the other direction: the tail of subscriptions that never passed through procurement, never had an owner, and renew on their own schedule.

What does the inventory cost to try?

The 12-month scan is free and needs no card. Keeping renewal alerts running costs $39 a month billed yearly on Starter ($468 a year), or $119 a month billed yearly on Business ($1,428). Build the list before choosing a platform; the list is the input every platform assumes.

SaaSClerk Blog · SaaS spend management comparisons

Sastrify Alternative for Small Teams: A Process Assumes a List

Short answer: Sastrify turns software buying into a process — requests, negotiation, renewals, license counts. That is valuable once the process exists and someone runs it. Under ~30 people most of the bill is not being bought; it renews on a schedule nobody has written down. The input a procurement platform assumes is a complete list of what is billing now, and that list can be built from billing email without buying anything; the scan is free, and renewal alerts cost $468 a year on Starter.

None of this is an argument against Sastrify. A company signing dozens of contracts a year needs a place where requests, approvals, and terms live, and negotiating each one by hand wastes more than the platform costs. The question is sequence. A procurement process is a filter; a filter is only as good as what flows into it. At ten people, most of the flow never files a request at all.

What Sastrify sells, by its public shape

Sastrify sits in the SaaS procurement category. Its public description centers on the buying process: intake forms for new tools, approval chains, benchmark pricing for negotiations, a contract and renewal calendar, and post-purchase license optimization. The jobs it automates are the ones a procurement team already does by hand — collect, compare, negotiate, record, revisit.

Those jobs are real work, and they get more expensive as the contract gets bigger. A team signing six-figure agreements needs them. The same team usually also has a person whose job is to notice what is already being paid — and at thirty people, often nobody does.

Three assumptions a procurement platform makes

Someone submits the request. A founder clicking upgrade on a pricing page skips intake entirely. So does a trial that converts on a saved card. The platform cannot govern a purchase it never received a request for, and it will not report it as missing — there is nothing to miss it from.
The contract is the source of truth for dates. Contracts record what was signed. Cards record what will actually be charged, which can differ: a seat added mid-term, a plan that changed at renewal, an annual plan renewed early. If the calendar follows the signature rather than the receipt, the date your process watches can be the wrong date.
The list is complete because the process is. Completeness is an assumption, not a measurement. Spend on personal cards, app-store subscriptions, and tools bought before the process existed lives outside it, and the platform will look complete while the tail grows underneath.

The arithmetic of visible and invisible spend

A procurement platform optimizes the spend it can see. Take an illustrative team: one negotiated contract at $20,000 a year where negotiation saves ten percent. That is $2,000, real money. Alongside it, fourteen small tools at $10 to $30 a month, some bought on a personal card, none owned by anyone. Together they bill roughly $3,000 a year, and nobody could name them from memory. The discount was earned; the tail was simply never on the table. These figures are arithmetic, not customer data — the point is that one line item gets optimized while a dozen smaller ones are not counted.

The tail behaves differently from contracts. It grows one click at a time, it shrinks only when someone notices, and it never appears in a benchmark, because each piece is too small to negotiate and too boring to discuss. That is why small teams can improve their largest contract and still see the total bill rise.

How to build the list before you buy a platform

Whether or not Sastrify is in your future, the inventory underneath it is built the same way, and it is the input any procurement process will later depend on.

Walk twelve months of receipts. Pull billing mail into one place and read it without filtering first. A receipt exists whether or not anyone remembers the purchase, and the amount on it is what the card was charged.
Group by vendor, keep every charge. Merging duplicate entries is fine; deleting last quarter's amount is not. The change between two invoices is a price signal you will want at renewal.
Take dates from receipts. The next charge date printed on an invoice beats the anniversary of a signup, because it reflects the plan actually in force — including upgrades, seat changes, and early renewals.
Put a person on every row. A subscription without an owner is one that gets renewed by default. The name can be the founder; it cannot be blank.
Append, never overwrite. Each new receipt is a new event. An append-only log keeps the history that a price-change alert depends on; editing last month's line erases it.

Where SaaSClerk fits

SaaSClerk starts from the mailbox, because billing evidence lands there regardless of how the purchase happened — through procurement, through a founder's card, or through a trial that converted. You connect one mailbox with a read-only Gmail scope; it reads twelve months of billing email and produces one line per service: name, amount, interval, next renewal date. Nothing in the mailbox is modified, and the token is encrypted at rest. Anything still active gets an email fourteen days before it renews.

What it deliberately does not do: intake, approvals, negotiation, contract management. Those are the jobs Sastrify is built for. What SaaSClerk produces is the list those jobs assume exists — current, dated, and owned.

The economics: the twelve-month scan is free and needs no card. Starter is $39 a month billed yearly ($468), Business $119 a month billed yearly ($1,428). Compare that with one subscription nobody remembered; the free scan exists so you can check that number before deciding anything.

Quick decision table

Your situation	Right tool
Under ~30 people, renewals keep surprising you, no one owns the list	SaaSClerk (saasclerk.app)
100+ people, many contracts a year, a procurement function that needs intake and negotiation	Sastrify
IT needs discovery and offboarding automation more than buying	An IT-first suite (see the Torii comparison)

One last thing before you decide

Run the audit first: scan your mailbox free at saasclerk.app. One list, an amount and a renewal date on every line. If the list is short and your contracts are large enough to run through procurement, a platform like Sastrify is the right next purchase — with our blessing. If the list surprises you, that is this week's work, and no process was required to find it.