What Should an 18-Person IT Managed Services Provider Actually Pay for Software?

Most "software cost" guides assume a business can just pick whichever tool is cheapest in each category. An MSP can't always do that, because two of its biggest cost centers — the PSA and the RMM — anchor two competing, largely non-interoperable ecosystems: ConnectWise (ConnectWise Manage + NinjaOne) and Datto/Kaseya (Autotask PSA + Datto RMM + Datto SIRIS). Pick a tool from the wrong ecosystem for the rest of your stack, and you don't just pay more — you lose the ticket-to-asset sync the whole PSA/RMM pairing exists to provide, and your techs end up reconciling client data by hand. That's the variable most generic per-seat estimates miss, and it's the biggest reason two MSPs the same size can have wildly different software bills.

Here's what we actually see, tool by tool and pillar by pillar, for an MSP around 18 employees — big enough to be running full PSA, RMM, and BCDR contracts, but small enough that fixing an ecosystem mismatch is still a weekend project instead of a company-wide migration.

Sales & Marketing: $255/mo — the one pillar with no ecosystem to fight

Unlike Core Operations, nothing in this pillar competes for the same job — Pipedrive, Mailchimp, and Calendly each cover a distinct function, so there's no duplicate-tool risk here. That makes it the cheapest pillar to get right and the one place in the stack where "just add all three" is usually the correct answer.

Pipedrive ($150/mo) tracks managed-services proposals, security assessments, and renewal opportunities through a visual pipeline. It earns its price on seat count, not raw headcount — a shop with one dedicated account manager pays near the floor. The common failure mode: technicians start logging client requests directly in Pipedrive deal notes because it's open on someone's screen, duplicating data that should live in ConnectWise Manage or Autotask, and nobody ever reconciles the two.

Mailchimp ($75/mo) sends the security-advisory and patch-Tuesday newsletters that keep clients aware their MSP is proactively watching their environment. It's cheap because MSP client lists are small — dozens to low hundreds of contacts, not a consumer marketing list — but it's also usually the first thing cut when budgets tighten, which is a mistake: at $75/mo it's the lowest-cost client-retention tool in the entire stack, and cutting it reads to clients as "our MSP stopped communicating," not "our MSP trimmed a line item."

Calendly ($30/mo) handles onboarding calls, quarterly business reviews, and vCIO strategy sessions. Its own integration list includes Google Workspace — not Microsoft 365 — which matters because most MSPs standardize their own team on Microsoft 365 Business Premium precisely to demonstrate the security posture they sell to clients. That mismatch means calendar sync isn't native for a Microsoft 365 shop; double-booked QBRs are a real, avoidable risk if nobody catches the gap during setup.

Core Operations: $2,055-2,530/mo — where the ecosystem choice actually lands

This pillar has three categories where two directly competing platforms exist — PSA, RMM, and BCDR — and in every one of them, the right move is picking exactly one, never both. What generic cost guides miss is that the choice isn't independent per category: ConnectWise Manage pairs natively with NinjaOne; Autotask PSA pairs natively with Datto RMM and, through it, Datto SIRIS. Mixing PSAs and RMMs across ecosystems means paying full price for a sync connection that doesn't exist.

IT Glue and ConnectWise ScreenConnect don't list a native Autotask PSA or Datto RMM integration in the current data — both only connect to ConnectWise Manage and/or NinjaOne. A Datto/Kaseya-anchored shop can still run them, but does so standalone, which is the $475/mo gap between the two totals above: same five tools, $1,000/mo of it bought without the sync benefit it's otherwise good for. (Our integration guide digs into how reciprocal these ties actually are — a couple of the ones claimed here are only listed on one side.)

Finance: $389/mo — cheap, but watch the QuickBooks ceiling

QuickBooks Online Plus ($90/mo) is priced for shops under 25 employees — and at 18, this representative MSP is already 72% of the way to that ceiling. Cross it without reassessing the plan and you either hit user or feature limits or get force-migrated to a pricier tier at renewal, usually at a moment nobody budgeted for it.

Gusto Plus ($200/mo) runs payroll for a team that mixes hourly field technicians with salaried account managers and engineers. The common mistake: not reconfiguring employee-type settings as that mix shifts, which misclassifies overtime-eligible technician hours — a real compliance exposure, not just a bookkeeping annoyance.

Ramp ($0/mo) is free because Ramp earns interchange revenue on card spend, not a subscription fee — worth knowing so you don't treat it as a no-cost afterthought. Skipping expense-policy setup because "it's free anyway" is the actual failure mode: hardware purchases and vendor renewals get miscoded and never roll up cleanly against the technician team's cost of service.

Bill.com ($99/mo) automates approval and payment routing for vendor invoices — Microsoft CSP renewals, security tool licenses, distributor bills. MSPs reselling CSP licenses at volume can have dozens of these monthly; without routing, approval becomes a bottleneck that delays payment past early-pay discount windows or triggers late fees on tight vendor terms.

Admin & Security: $524/mo

Microsoft 365 Business Premium ($264/mo) bundles Defender for Business and Intune — the stack most MSPs run on their own team specifically to demonstrate the security posture they sell clients. The common overspend: licensing every employee at the full Business Premium tier, including non-technical admin and sales staff who never touch a managed device or need Intune enrollment.

1Password Business ($95/mo) holds shared vaults for client credentials, PSA and RMM admin logins, and vendor portal access. The failure mode is mundane and common: a technician pastes a client password into a ConnectWise Manage ticket note "just this once" instead of the vault, which quietly defeats the audit trail 1Password exists to provide.

Huntress Managed EDR ($85/mo) layers managed threat detection on the MSP's own endpoints. It doesn't list a native 1Password integration in the current data — meaning a credential-theft alert in Huntress and a vault-access anomaly in 1Password don't automatically cross-reference. That's a manual watch item, not an automated one, and it's easy to assume otherwise.

DocuSign ($80/mo) handles e-signature for managed-services agreements and SLAs. Its listed integration with Pipedrive isn't reciprocated on Pipedrive's own side — so a signed contract can sit "closed" in DocuSign while Pipedrive's pipeline still shows the deal as open, until someone manually updates the stage. It's a small gap, but it's exactly the kind of thing that makes a forecast wrong.

What this adds up to

Add it up and a genuinely optimized, single-ecosystem stack for an 18-person MSP lands at $3,223-3,698/mo. Run every Core Operations category in duplicate — both PSAs, both RMMs, both BCDR platforms — and the same coverage costs $5,323/mo. But the typical actual spend we see for shops this size is $7,800/mo, meaningfully above even that full-duplication number. The gap above $5,323 is almost never a sixth tool — it's per-seat pricing creep on products like Microsoft 365 and Huntress that scale with headcount, plus contract renewals nobody renegotiated after the team grew.

The fastest way to see where your specific stack lands against these numbers is to run the free audit — it uses your actual headcount and current spend, not a generic estimate.