Flex
7.7#3 in rental softwareFrom $100 a monthAndroidiOSWebAPI
VisitFlex vs KeysBlu
What both publish
| Fact | Flex | KeysBlu |
|---|---|---|
| API limits | Enterprise and GTS accounts receive a standard 100,000-request monthly API allowance, while Lite has no API access; concurrency is capped at 30 requests. | The developer page states a limit of 600 requests per minute per API key. |
| Integrations | Official integrations include QuickBooks, DocuSign and Zapier, with Zapier workflows able to connect Slack, Gmail and Google Drive. | KeysBlu offers a REST Booking API, an embeddable booking widget, and a WordPress plugin; its developer page also describes Webflow support. |
| Mobile app | Flex5 is distributed for Apple and Android devices and includes scanning, inventory, maintenance, pull-sheet preparation, returns and signature capture. | KeysBlu’s Android app listing describes tools for reservations, check-in and check-out, payments, fleet status, and damage documentation. |
| Reservations | Flex provides reservation and availability management across concurrent jobs and locations. | Its booking funnel shows real-time unit availability across locations and vehicle classes and lets customers book online. |
Flex plans
- Flex Asset Solutions$100 a month
- RFID module$100 a month
- Flex GTS$260 a month
- Flex$510 a month
- Flex Rental Solutions$510 a month
KeysBlu plans
- Starter$199 a month
- Growth$349 a month
- Scale$549 a month
Pick Flex if…
Flex is aimed at rental and production businesses with 500 or more assets, multiple jobs, or multi-user and multi-location operations. The maker says it may not suit 1–2 person operations or businesses with budgets under $300/month.
Pick KeysBlu if…
KeysBlu suits rental operators managing car, equipment, boat, RV, or trailer fleets. It may be useful to businesses that need online reservations alongside fleet records, agreements, and return tracking.