Event vendor management software: eight things to check before you buy

This guide is for planners, agencies and in-house teams that hire vendors for their own events: a caterer, an AV crew, a venue, rentals, staffing. It covers the software that tracks those vendors, whether you call it a system, an app or a tool. Most of the first results for this search are product pages from software companies, so this guide is written from the buyer's side.

Here, a vendor is a business you hire and pay. It is not a stallholder who registers for a market or a fair: that is another kind of software, built around stall sales and applications. It is not the tool a vendor uses to run its own business, and it is not a wedding planner for a couple.

Below you will find when a spreadsheet is enough, a grid of eight things to check with a question to ask in each demo, and the paperwork to keep for each vendor. The tools you will meet fall into a few families: event suites with a vendor module, general project tools, no-code builders, custom development and the spreadsheet. We build Squena, an event workspace, so we name no other tool and give you questions instead. Its column is a claim to test.

When a spreadsheet is enough

As a rule of thumb, a spreadsheet is enough while one person runs one event with a dozen vendors or fewer. One row per vendor, with a stage, the amounts and the next date, covers it. Our event vendor list template goes further and adds deposit, balance and paperwork columns. Keep one shared vendor tab and one tab per event, so a vendor's history does not fork across files.

Software starts to pay off when the list no longer fits in one person's head. These are typical signs:

• Two events run at the same time, each with its own quotes.
• A second or third person edits the list, and not everyone should see amounts.
• You hire the same vendors again and want your notes from last time.
• Quotes, contracts and certificates sit in several inboxes and folders.
• A client or a finance team asks for last year's vendor list, and you rebuild it by hand.

The buying grid: eight things to check

Use the table in a demo. Ask the question in the middle column, and ask to see the answer on screen, not on a slide. The last column describes Squena as of October 9, 2026, using its English labels.

Each row guards against one failure. Without a reusable database, you search for the same caterer again. Without needs per event, a gap shows up when the event is close. Without stages, nobody knows what is committed, and without rights, anyone can commit it. Documents and payments are where the money and the risk sit, and the vendor's view affects whether vendors answer.

Bring your own material to the demo. Take last year's vendor list and three real quotes for one need, and ask the seller to enter them live. Score each row yes, partly or no, and write down what the seller had to explain. Count a feature on the roadmap, or a report the seller builds for you, as a no. Our guides to comparing vendor quotes and to negotiating with event vendors cover what comes after.

In a spreadsheet, the first, second, fourth, fifth and sixth rows become columns, a tab per event and links to a shared folder. The rest is harder. Answers mostly arrive by email and get retyped, a shared file shows every amount to anyone with access unless you hide or protect cells, and vendors rarely work inside your file.

Squena's “projected” budget is what is committed plus every quote still pending (“Quote received” or “Approved”), one amount per vendor, so you set aside the vendors you drop. A vendor's typed amount reaches the budget only when your team enters it under “Quote received” or accepts the signed quote.

Tax forms for U.S. vendors: the W-9 and the 1099

In the United States, a business or nonprofit reports what it pays a non-employee for services from $2,000 a year for payments made after 2025. The same threshold now applies to backup withholding. Under 26 U.S.C. § 3406(b)(6), withholding reaches a payment for services only once your payments to that vendor reach that threshold, or if you had to report or withhold the year before. Payments to corporations, including an LLC taxed as a C or S corporation, are generally excluded. Rents, such as space or machine rentals, go on Form 1099-MISC, also from $2,000, except space rent paid to a real estate agent or property manager. Merchandise is reportable on neither form, but materials supplied incidentally to a service count with the service.

A payer must withhold 24% of a reportable payment when the payee has given no taxpayer ID. What you can take from it: ask for a W-9 before you pay a vendor you may have to report. Our event vendor list template has a tax-form column for this. Squena has no W-9 field and no yearly total per vendor.

Insurance certificates: evidence of coverage, not the policy

In Maryland, a certificate of insurance “is not a policy of insurance” and does not “amend, alter, or extend” its coverage. The Insurance Code says so for property and casualty insurance on risks located in that state. What you can take from it: file the certificate, and track the end date of the policy period it shows. Our event vendor list template has a certificate column, and a booked vendor without one turns amber.

Squena has no end-date field. It guesses a document's type from the file name, mostly with French words, so “certificate-of-insurance.pdf” stays a plain “Document” for good.

Four questions outside the grid

Four more questions change the decision, whatever the tool does with vendors.

• What is the price based on: seats, events, vendors or messages? A per-seat price grows when seasonal staff need access, so ask for the total at your team size.
• Can you take your vendor data out in a standard format, and what happens to it if you stop paying? A vendor database is years of work, so ask for a sample export before you sign.
• Where is your data stored, and who at the seller can read it? Ask to see the privacy policy.
• Who answers when something breaks the week of an event, and during which hours?

Where Squena stops

From Squena's screens, code, pricing page and terms, as of October 9, 2026.

• Amounts are in euros, even in the English interface. There is no dollar option.
• Moving a vendor to “Signed” needs its “SIRET” field filled in (the French company number, 14 digits when added by hand) and an email or phone. No U.S. tax ID field exists: ask how Squena handles U.S. vendors.
• No guest registration, ticketing or stall applications: an event holds a headcount, not an attendee list.
• Vendor import takes a CSV file with five fields: name, field of expertise, email, phone, and address or city. It refuses more than 2,000 rows.
• It never chases a vendor by itself: after five days of silence, its assistant Clara flags “No reply,” and you resend the request.
• A quote request link lasts 14 days at most, less if the event starts sooner.
• No self-service export yet: on request, all your data is sent within 72 business hours.
• Every team member takes a seat, volunteers included: Pro includes three, then charges per person.
• The free plan allows one active event and two people; free or new workspaces can write to 30 people a day.