Fosterling vs. Animal Shelter Manager: Open Source vs. Hosted Rescue Software

If you have searched for free shelter software, you have met Animal Shelter Manager (usually shortened to ASM). It is one of the oldest and most capable systems in animal welfare, it is open source, and you can genuinely run it without paying a license fee.

Fosterling takes a different route: a hosted platform built around foster-based and small-team rescues, free for small caseloads and priced openly above that. This is a candid look at how the two compare, including where ASM is the better answer.

The short version

• Animal Shelter Manager is a mature, deeply featured, open-source shelter system. If you have technical help on the team - or you are happy to pay for their hosted option - it covers an enormous amount of ground for very little money.
• Fosterling is a hosted operations platform for foster-based rescues and small shelters. Nothing to install or maintain, a modern mobile-friendly interface, and workflows built around foster homes rather than kennels.

Where Animal Shelter Manager shines

• Cost. Self-hosting the open-source release costs you a server and your time. Their own hosted service is inexpensive compared with commercial shelter software.
• Breadth. Intake, medical, licensing, lost and found, waiting lists, publishing to adoption sites, accounting, document templates - decades of features have accumulated.
• Control and portability. It is your database. You can query it, back it up, and move it. For organizations with data-sovereignty concerns, that matters.
• Configurability. Almost every list, field, and document template can be edited to match how your shelter already works.

Where rescues feel the friction

• Someone has to run it. Self-hosting means servers, upgrades, backups, and security patches. In a volunteer-run rescue, that job quietly becomes one person's unpaid second job - and a single point of failure when they step back.
• The interface shows its age. ASM is dense and window-heavy. It rewards trained, regular users and punishes the volunteer who opens it once a fortnight.
• Configuration is the price of flexibility. Because so much is adjustable, a new organization faces a long setup before the system feels like theirs.
• Foster work is supported, not centered. The model is still a shelter with a building. Foster households, home visits, and reimbursements can be tracked, but they are not the spine of the product.
• Mobile is an afterthought. Intake in a parking lot, a check-in from a foster's phone, a volunteer updating a shift - these are awkward on a desktop-first interface.

How Fosterling is different

Nothing to host

Fosterling is hosted and updated for you. There are no servers, no upgrade windows, and no volunteer holding the keys to a machine nobody else can log into.

Foster households are first-class

Capacity, species and age preferences, medical experience, current placements, portal access, and reimbursements all live together. Fosters get their own portal showing their pet, care instructions, check-ins, and messages - no shelter login required.

Assisted intake

Snap a photo and jot a note, and Fosterling drafts the animal profile - breed, colour, estimated age, weight, temperament, medical flags - for you to correct and approve. See how we structure intake.

Public lost and found with automatic matching

Fosterling runs a free public lost-and-found board and cross-matches found animals against open lost reports by description, location, and microchip. More on lost-pet matching.

A calmer interface

Mobile-first layouts, generous spacing, plain wording. The aim is software a tired volunteer can use at 9 PM without a training session.

Published pricing

Fosterling is free forever for small rescues (up to 25 animals in care), with paid tiers listed on the site. No sales call, no annual contract required.

Feature comparison at a glance

Capability	Animal Shelter Manager	Fosterling
Licence cost	Free (open source); low-cost hosting option	Free up to 25 animals; published tiers above
Self-hosting	Yes	No - hosted for you
Ongoing maintenance	Yours, if self-hosted	None
Animal records and medical history	Yes - very deep	Yes
Foster household management	Supported	First-class, with a foster portal
Intake draft from photo and notes	No	Yes
Public lost-and-found with auto-matching	Lost and found records	Public board plus automatic matching
Adoption site publishing	Yes - many integrations	Feeds for adoption sites
Licensing, accounting, document templates	Yes - deep	Lighter
Mobile use	Limited	Designed for phones
Data ownership	Full, if self-hosted	Export your data any time

Who should pick which?

Choose Animal Shelter Manager if: you have reliable technical help, you want full control of your database, you need licensing or accounting depth, or budget is the single hardest constraint you face.

Choose Fosterling if: you are foster-based or volunteer-led, nobody on the team wants to run a server, most of your work happens on a phone, and the bottleneck in your week is data entry, foster coordination, or lost-pet triage.

The honest take

ASM is not outdated in what it can do - it is remarkable value and it will outlast most commercial tools. The real cost is not the licence, it is the hours someone spends keeping it running and the training new volunteers need before they are useful in it.

If your rescue has those hours, ASM is hard to beat. If it does not, Fosterling is free to start - no credit card, no sales call. If you are still weighing options, our guide to Shelterluv alternatives covers the wider field.