What an outsourced software development company is and how it works

• An outsourced software development company is a third-party firm hired to design, build, or maintain software that a client does not staff for internally.
• Buyers use the model for access to specialized engineers, faster delivery, and lower fixed cost — not cost alone, which now ranks below talent and agility.
• Engagements run as project-based contracts, dedicated teams, or staff augmentation, each suited to a different level of control.
• The market is large and growing: roughly $618 billion in 2026, expanding at near double-digit rates through 2031.

An outsourced software development company is a business that other organizations pay to write, test, and maintain software on their behalf.

Instead of recruiting an in-house engineering team, a client contracts the provider to deliver a defined product — a mobile app, an internal platform, an integration — or to supply developers who work under the client’s direction.

The arrangement sits inside the broader IT outsourcing market, which research firm Mordor Intelligence values at about $618 billion in 2026, growing at a 9.6% compound annual rate through 2031. For buyers, it is a way to ship without building a permanent department.

For providers, it is the core product they sell.

What an outsourced software development company actually does

The work ranges from a single feature to an entire engineering function, depending on the contract.

Most firms cover the full build cycle: requirements, architecture, coding, quality assurance, deployment, and ongoing maintenance. Some specialize — a shop might do only mobile apps, only data engineering, or only legacy modernization.

Others position themselves as generalists who staff whatever the roadmap demands.

A capable provider also handles the parts buyers tend to forget: project management, security review, documentation, and handover. The difference between a vendor and a body shop usually shows up here, in whether the firm owns outcomes or just supplies hours.

Day to day, the engagement looks less like a black box and more like an extension of the client’s own process. A well-run provider plugs into the buyer’s ticketing system, joins the same stand-ups, and reports against the same metrics the internal team already tracks.

The deliverables are tangible: a release on a known cadence, test coverage that holds at an agreed threshold, and a backlog that reflects business priorities. When a provider shows that rhythm during a trial, it usually carries through the contract.

Why companies hire an outsourced software development company

The reasons have shifted, and the shift matters for how you evaluate a provider.

Cost was once the headline. It no longer is. In Deloitte’s 2024 Global Outsourcing Survey, executives ranked access to specialized skills, operational agility, and capability-building above pure savings.

Companies outsource software because hiring senior engineers is slow and expensive, and because a provider can spin up a team in weeks rather than quarters.

Speed is the second draw. A firm that has shipped fifty similar products carries patterns, tooling, and people that an internal team would have to assemble from scratch. That experience compresses timelines and reduces the number of expensive early mistakes.

The third reason is flexibility. A business can scale a contracted team up for a launch and down afterward without the cost and friction of layoffs. For more on doing this well, see OA’s guide to outsourcing software development the right way.

3 engagement models an outsourced software development company offers

Providers package their work in a few standard ways, and the model you pick determines how much control you keep.

1. Project-based delivery

The provider owns a defined scope, timeline, and price. You hand over requirements and receive a finished product, which suits well-specified work with stable goals.

2. Dedicated team

The firm assembles a team that works only on your roadmap, billed monthly. You set priorities while the provider handles recruitment, retention, and management — a fit for long-running products that keep evolving.

3. Staff augmentation

You add the provider’s engineers to your existing team and direct them yourself. This gives the most control and works when you have strong internal leadership but a gap in headcount or a specific skill. The seven software development models compared on OA go deeper on matching a model to your situation.

Here is how the three compare on the factors most buyers weigh.

How to choose an outsourced software development company

Selection is where most engagements are won or lost, so treat it as a structured exercise rather than a gut call.

Start with proof. Ask for case studies in your domain, reference clients you can actually call, and code samples or a paid trial sprint. A firm that resists a small trial is telling you something.

Check the working model next. Time-zone overlap, communication cadence, and the seniority of the people you will actually get — not the names in the sales deck — predict day-to-day quality more than the logo.

Security posture matters too; for regulated data, confirm certifications such as ISO 27001 or HIPAA compliance before signing.

Finally, read the contract for ownership. Intellectual property, source-code access, and exit terms should be explicit. You want to leave with everything you paid for if the relationship ends.

The most common way these deals go wrong is not a bad vendor but a vague brief. When scope is loose, the provider fills the gaps with assumptions, and the client discovers the mismatch only at delivery.

Tightening the statement of work, agreeing on acceptance criteria, and naming the people on both sides who can approve changes removes most of that friction before it starts.

A short discovery phase, paid and time-boxed, is often cheaper than the rework a rushed kickoff produces, and it shows how the provider handles ambiguity.

Frequently asked questions about outsourced software development companies

Common questions from buyers weighing the model and providers positioning against it.

What is the difference between outsourcing and offshoring software development?

Outsourcing means hiring an outside firm regardless of location. Offshoring means moving the work to another country, often for cost or talent reasons. A company can outsource locally, offshore to its own subsidiary, or do both at once.

How much does an outsourced software development company cost?

Rates vary widely by region and seniority, from roughly $25 an hour in parts of Asia to $150 or more in North America and Western Europe. Total cost depends on team size, project length, and the engagement model rather than the headline rate alone.

Is outsourced software development safe for sensitive data?

It can be, with the right controls. Look for recognized certifications, signed non-disclosure and data-processing agreements, and contractual limits on where and how your data is stored and accessed.

How do I keep quality high with an external team?

Define acceptance criteria up front, review work in short cycles, and keep at least one internal owner accountable for the relationship. Quality follows clear scope and steady communication more than any single contract clause.

Key takeaways

The model is mature, but success still comes down to fit and discipline.

• An outsourced software development company builds and maintains software for clients who choose not to staff that work in-house.
• Talent access, speed, and flexibility now drive the decision more than cost savings.
• Project-based, dedicated-team, and staff-augmentation models trade control for convenience in different ways.
• Vet providers on references, the actual people assigned, security posture, and IP terms — not on price or pitch.