Property Management / Report Card / Updated August 2026
Guide / By Rob Lowry, Founder of LaunchEngine
The PM software API report card
Six property management platforms, graded on whether you can actually build on them. Graded by a team that runs production integrations on these APIs every day, with the rubric, the math, and the evidence published so you can check our work.
How we grade
Seven axes, a 0-4 scale, published math
Every platform is scored by people who have integrated against it, in production where we operate it, from documentation and hands-on scoping where we don't. Each axis gets 0 to 4 (fail, poor, mixed, good, great). The letter is the straight average of scored axes: A at 3.5+, B+ at 3.2, B at 2.8, C+ at 2.4, C at 2.0, D+ at 1.5, D at 1.0, F below. Stability is scored only for platforms we run in production; where we don't, it's excluded from the average, not guessed.
- Existence. Is there a real public API, or a partner program wearing one as a costume?
- Access. Can a customer get working credentials today, or after an upgrade and a sales cycle?
- Coverage. Can the API do what the app can, reads and writes, or just a sliver?
- Auth. Scoped, role-aware credentials, or shared secrets with no granularity?
- Events. Webhooks that tell you when things change, or polling forever?
- Docs & DX. Public docs, a sandbox, a changelog, or a login wall and folklore?
- Stability. Does it hold up under real production volume? Scored only where we run it.
01 / RentEngine
RentEngine
API grade
A
avg 3.57 / verified Aug 2026
The most complete, most openly documented API in the set, and the fastest-moving. The only platform here where a third-party reporting dashboard is buildable end to end from documented public interfaces (we shipped one).
| Existence | GREAT | Fully public docs, 18 resource categories including prospects, showings, applications, calls |
| Access | GOOD | Self-service tokens for customers; staging environment; no open non-customer sandbox |
| Coverage | GREAT | Funnel, comms, reporting, and lockbox data all queryable; writes where workflows need them |
| Auth | GOOD | JWT bearer tokens carry the creating user's permissions; not independently scoped per token |
| Events | GREAT | Webhooks per data type with retry delivery |
| Docs & DX | GREAT | Public reference, staging, active weekly changelog |
| Stability | GOOD | Reliable in our production use; young API moving fast, hence 3 not 4 |
Full evidence and working notes: Leasing APIs guide.
02 / Rentvine
Rentvine
API grade
B+
avg 3.29 / verified Aug 2026
Open by default, included in the single plan, genuinely role-scoped keys, and bigger than its docs admit. Loses points only where the reference trails the API itself.
| Existence | GREAT | Open REST API included at no extra cost, ~177 documented operations |
| Access | GOOD | Customer self-service keys in Settings; no public sandbox |
| Coverage | GOOD | Broad reads including owner statements and a unique accounting diagnostics suite; writes on bills, work orders, inspections |
| Auth | GREAT | Role-scoped API keys: real least-privilege granularity |
| Events | GOOD | Signed webhooks work in production but are absent from the API reference |
| Docs & DX | MIXED | Good public docs with real gaps (webhooks, file reads undocumented); no official SDK (the open-source one is ours) |
| Stability | GREAT | Years of stable production use in our integration |
Full evidence and working notes: Rentvine API guide.
03 / Buildium
Buildium
API grade
B
avg 3.14 / verified Aug 2026
An excellent, mature API behind a plan gate. Outside-in graders mark Buildium down hard for access; having run it in production for years, we grade what's behind the gate too, and it's the most operationally polished API in the set.
| Existence | GREAT | True public API with a real developer portal |
| Access | MIXED | Premium-plan only (from $400/mo published); no API on lower tiers |
| Coverage | GOOD | Broad reads and writes including custom fields; some accounting read-only; tenant-only templated email |
| Auth | MIXED | Client ID/secret headers, no OAuth, no per-key scoping, no CORS |
| Events | GOOD | Broad webhook catalog with thin payloads (IDs only, fetch-back required) |
| Docs & DX | GREAT | Public docs, free sandbox, published deprecation windows with year-long support |
| Stability | GREAT | Years of production use: predictable limits, disciplined versioning |
Full evidence and working notes: Buildium API guide.
04 / ShowMojo
ShowMojo
API grade
C+
avg 2.50 / verified Aug 2026
A working, publicly documented listing-centric API with lead and showing webhooks, but the current version is officially legacy and the funnel isn't queryable, only pushed.
| Existence | GOOD | Real API, publicly documented at docs.showmojo.com |
| Access | GOOD | Included for customers |
| Coverage | MIXED | Listings import/update, properties, report export; no query endpoints for leads or showings |
| Auth | MIXED | Endpoint-level credentials without documented scoping |
| Events | GOOD | Lead and showing webhooks in v3 |
| Docs & DX | MIXED | Public docs but the live API is 'legacy v3' with v4 still in development |
| Stability | not scored | Not scored: we don't run ShowMojo in production |
Full evidence and working notes: Leasing APIs guide.
05 / Tenant Turner
Tenant Turner
API grade
C
avg 2.17 / verified Aug 2026
Improving fast: the July 2026 API update added the funnel data that matters. Docs behind the login and no announced webhooks hold the grade down; this is the score most likely to rise.
| Existence | GOOD | Real API, meaningfully refreshed July 2026 |
| Access | GOOD | Free for all customers, keys generated in-app |
| Coverage | MIXED | Applicants, pre-qualification, showings, feedback added; no documented reporting endpoints |
| Auth | MIXED | API keys at customer and property level; no documented scoping |
| Events | POOR | No webhooks announced; assume polling |
| Docs & DX | MIXED | New docs live inside the customer portal; older partner docs and a community SDK are public |
| Stability | not scored | Not scored: we don't run Tenant Turner in production |
Full evidence and working notes: Leasing APIs guide.
06 / AppFolio
AppFolio
API grade
D+
avg 1.57 / verified Aug 2026
Real capability exists (the Reports API is genuinely useful and stable), but access is arranged account by account, nothing has a public home, and there are no events at all. The band description writes itself: partner-gated or export-only.
| Existence | MIXED | A Reports API and a tier-gated Database API exist; no public developer program |
| Access | POOR | Per-account arrangements, tier gates, credentials provisioned case by case |
| Coverage | MIXED | 60+ reports as read-only JSON; write access reported only on the top tier |
| Auth | MIXED | Basic auth client ID/secret from in-app settings; no scoping, no OAuth |
| Events | FAIL | No webhooks; integrators poll reports and parse notification emails |
| Docs & DX | POOR | No official public docs; the community fills the gap with gists and third-party writeups |
| Stability | GOOD | The Reports API has been stable under our production sync volume |
Full evidence and working notes: AppFolio API guide.
Why we can grade these
We build on these APIs for a living
LaunchEngine runs production integrations that sync PM platforms into monday.com operating systems. If your platform graded well, we can put its API to work for you. If it graded badly, we've usually found the sanctioned workaround, and it's in the platform's guide.
About this report card
Grades are LaunchEngine's editorial assessment of each platform's API for third-party integration, produced under the published rubric above as of August 2026, and do not assess any company's products, service, or business beyond its API. Scores draw on public documentation, vendor announcements, and LaunchEngine's own integration experience (through sanctioned, client-provisioned access where applicable); underlying evidence lives in the linked guides. APIs change, and grades move on evidence: email rob@launchengine.com to report an inaccuracy. Disclosures: LaunchEngine is a Buildium Marketplace partner and sells integrations for Buildium, Rentvine, and RentEngine; no vendor paid for inclusion or any score. All trademarks belong to their owners; no vendor authored, reviewed, or endorsed this report card. This page is informational only and not financial, legal, or business advice.
FAQ
Common questions about the PM software API grades.
Want your PM platform's data working for you?
Book 30 minutes and we'll show you what your platform's API can actually do, and what we'd build on it.