Custom Software Development Services You Own From the First Commit
Custom software development is the design, build and maintenance of an application written for one organisation's workflow, rather than bought as a package and configured to fit. InApps runs the whole thing: scoping, architecture, build, QA, release and the years after. Senior engineers in Ho Chi Minh City. Your repository, your architecture calls, your IP from the first commit.
Trusted by engineering teams across 15+ countries - from startups to Fortune 500.
Custom builds rarely fail on the code
Six failure modes we hear on almost every first call. Not one of them is a talent problem.
A fixed-price quote meets its first real change request in week three. The rest of the project is a negotiation.
Senior engineers pitch. Juniors build. You find out in sprint four, from the pull requests.
Six months of work lands with no runbook. The handover is a Slack thread and a laptop that left with someone.
The package covers 70% of the workflow. The other 30% runs on spreadsheets and goodwill.
Integrations were one line on the estimate. They turn out to be half the build.
The system ships. Nobody who wrote it is still available to change it.
What custom software development services actually cover
Is a package nearly right, but not quite?
Software shaped around your process, not the reverse
Custom software development means the application is written for your workflow. Not configured, not extended with plugins. Written. That single difference is why the cost curve and the timeline look nothing like a SaaS subscription.
The work is not only the build. It is deciding what to build, choosing an architecture that still holds in year three, integrating the systems you already run, testing it, releasing it, and changing it once real users arrive. InApps covers all of that with one team. There is no handover to a maintenance vendor who was never in the room.
New product and platform builds
A system that does not exist yet, from scoping to production.
- Web applications and internal platforms
- Customer portals and marketplaces
- Mobile apps, native or cross-platform
- APIs and integration layers
- Data pipelines and reporting
- AI features on your own data
Legacy modernisation
A system that still earns money and can no longer be changed safely.
- Codebase and architecture audit first
- Incremental rewrite, never a big bang
- Database and API migration
- Cloud re-platforming
- Test coverage where there was none
- Documentation rebuilt as we go
Integration work
The half of the estimate most vendors get wrong.
- ERP, CRM and payment systems
- Partner and third-party APIs
- Legacy SOAP and file-drop interfaces
- Identity and single sign-on
Run and evolve
After launch, which is where most of a system's life happens.
- SLA-backed support
- Monitoring and incident response
- Sprint-based feature work
- Security patching and upgrades
- Cost and performance tuning
- Documentation kept current
Custom build, off-the-shelf, or low-code
Custom is not automatically the right answer. This is the honest version of when it is.
| Criterion | Custom build | Off-the-shelf SaaS | Low-code platform |
|---|---|---|---|
| Fit to your workflow | Exact. It is written for it | Close on the common 70% | Good until a rule the builder cannot express |
| Time to first release | Months | Days | Weeks |
| Cost shape | Higher up front, then flat | Low up front, per seat forever | Low up front, platform fee scales |
| Cost at 500 users | Unchanged. It is your software | Multiplies by seat | Multiplies by seat and by run |
| Changing it later | Anything is possible. You set the priority | The vendor roadmap decides | Inside the platform's limits only |
| Integration depth | Whatever your systems expose | Whatever the vendor built | Connector library, then custom code anyway |
| Who owns it | You. Source, IP and deployment | The vendor | The platform holds it |
| How it ends | When nobody funds the next change | When your process outgrows the product | When you hit the ceiling and rebuild |
Where we have shipped custom software before
750+ projects across fifteen countries. The regulatory context is usually the hard part, not the stack.
| Industry | What we build there | What makes it hard |
|---|---|---|
| Banking & fintech | Core integrations, payment flows, customer portals | Audit trails, data residency, regulator sign-off |
| Insurance | Policy administration, claims workflow, broker portals | Legacy policy systems that cannot go down |
| Healthcare | Patient portals, scheduling, clinical data exchange | Patient data handling, HL7 and FHIR interfaces |
| Retail & eCommerce | Storefronts, loyalty, order and stock synchronisation | Peak traffic, and stock that is wrong the moment it is stale |
| Logistics & supply chain | Fleet and route tools, warehouse and customs interfaces | Offline devices and partner APIs written in 2009 |
| Manufacturing | MES and ERP extensions, shop-floor and IoT capture | Machines that speak protocols, not JSON |
| Food & beverage | Ordering, POS integration, franchise reporting | Hundreds of sites, one release window |
| SaaS & startups | Multi-tenant platforms, billing, admin tooling | A roadmap that moves faster than the architecture |
From scoping call to production, and the years after
Scope and estimate
One workshop, then a written scope. We would rather lose the deal here than in month four.
Architecture and design
Decisions get written down. Including the ones we argued about.
Build
Two-week sprints, a demo at the end of each. Nothing is ever 90% done.
Hardening
The part vendors quietly skip when a date is slipping.
Run and evolve
The system is live for years. It has to keep changing, and the same team keeps changing it.
How to evaluate a custom software development company
Four questions separate vendors quickly. Ask us the same four. If any answer is vaguer than the ones below, that is the finding.
Who actually writes the code?
Ask for the names and the seniority of the people who will be on your project, not the ones on the pitch call. Ask what happens if one of them leaves. If the answer is a resource pool, price the ramp-up in before you compare quotes.
What happens when the estimate is wrong?
Every estimate is wrong somewhere. The question is what the vendor does next: absorb it, raise a priced change request, or cut scope quietly and not mention it. Ask to see the change-request process before you sign, not after.
What do you own, and from when?
Ask whether IP transfers on signature or on final payment. Ask where the source lives during the build. Ask whether any component is retained or reused elsewhere. Get all three answers into the contract, because that is the one that matters if the relationship ends badly.
What does leaving look like?
Ask what you receive on the last day: source, infrastructure-as-code, credentials, documentation, and a build that runs from a clean checkout. A firm that has done a clean exit before can describe it in detail. One that has not will talk about partnership instead.
Four stages before anyone touches your codebase
Live coding & system design
- Real-world coding challenge
- System design interview
- Code quality and problem solving
Communication & English
- Technical communication
- Client-facing scenario
- Written and spoken English
Agile collaboration & ownership
- Agile mindset and teamwork
- Ownership and accountability
- Adaptability and growth mindset
Final review & reference check
- Technical panel interview
- Reference and background check
- Culture and values alignment
What custom software development costs in 2026
We do not publish a rate card. The honest number depends on scope, integration count and how long you need the team. What we can give you is the market. These are 2026 hourly ranges compiled from three published rate surveys, so you can sanity-check any quote you receive, including ours.
| Role (senior) | North America | Eastern Europe | Vietnam / SE Asia |
|---|---|---|---|
| Full-stack engineer | $120–200 / hr | $45–75 / hr | $30–50 / hr |
| DevOps / cloud engineer | $130–200 / hr | $50–85 / hr | $35–55 / hr |
| AI / ML engineer | $140–220 / hr | $60–95 / hr | $40–65 / hr |
| QA automation engineer | $85–140 / hr | $35–60 / hr | $22–40 / hr |
Estimate a build team at benchmark rates
Pick a role and a headcount. The figures are the market bands in the table above, at 160 hours a month.
Around 75% below the North American benchmark — a gap of roughly $230,400 a year at these midpoints.Around 75% below the North American benchmark — a gap of roughly $460,800 a year at these midpoints.Around 75% below the North American benchmark — a gap of roughly $691,200 a year at these midpoints.Around 75% below the North American benchmark — a gap of roughly $921,600 a year at these midpoints.Around 75% below the North American benchmark — a gap of roughly $1,152,000 a year at these midpoints.Around 73% below the North American benchmark — a gap of roughly $230,400 a year at these midpoints.Around 73% below the North American benchmark — a gap of roughly $460,800 a year at these midpoints.Around 73% below the North American benchmark — a gap of roughly $691,200 a year at these midpoints.Around 73% below the North American benchmark — a gap of roughly $921,600 a year at these midpoints.Around 73% below the North American benchmark — a gap of roughly $1,152,000 a year at these midpoints.Around 71% below the North American benchmark — a gap of roughly $244,800 a year at these midpoints.Around 71% below the North American benchmark — a gap of roughly $489,600 a year at these midpoints.Around 71% below the North American benchmark — a gap of roughly $734,400 a year at these midpoints.Around 71% below the North American benchmark — a gap of roughly $979,200 a year at these midpoints.Around 71% below the North American benchmark — a gap of roughly $1,224,000 a year at these midpoints.Around 72% below the North American benchmark — a gap of roughly $156,480 a year at these midpoints.Around 72% below the North American benchmark — a gap of roughly $312,960 a year at these midpoints.Around 72% below the North American benchmark — a gap of roughly $469,440 a year at these midpoints.Around 72% below the North American benchmark — a gap of roughly $625,920 a year at these midpoints.Around 72% below the North American benchmark — a gap of roughly $782,400 a year at these midpoints.
Market benchmark range, not an InApps quote. Figures are third-party 2026 survey data for the region, not our rates, and they cover the team only. A full project cost also carries scoping, design, QA, infrastructure and the integrations, which is why the honest number needs a conversation. Ask for a written estimate and you will get a real one for your actual scope.
Benchmark sources
- Aalpha — Offshore Software Development Rates by Country & Region 2026
- MarsDevs — Global Developer Rates 2026: Costs by Country, Role, Seniority
- FullStack Labs — 2026 Software Development Price Guide & Hourly Rate Comparison
Ranges are a conservative synthesis: where the three sources disagreed we took the wider span rather than the flattering end. Compiled August 2026.
Proof, not promises
Ten years of delivery, condensed into four numbers we are happy to have audited.
Ask the people who stayed
Every quote below is from a verified review. None of them were written by us.
“Clear expectations, rules that actually hold, delivered on time. And the people are genuinely easy to work with, not just professionally, but as humans.”
Whose code is it, and who can see it?
Two questions decide most security reviews. What stops your source leaving, and what happens to ownership if the engagement ends badly. Here are both answers, in the order legal asks them.
IP is yours from the first commit
Everything written for you is assigned to you under the engagement agreement. No milestone and no final payment gates the transfer, the work lives in your repository under your access control throughout, and nothing is retained or reused on another account.
ISO/IEC 27001:2022 certified
A certified information security management system audited against the 2022 revision, not a self-attestation. It covers the office, the devices and the network, and carries the access control, logging and incident response the standard requires.
NDA before repository access
A bi-directional NDA is signed before anyone gets an invite, and every engineer on your project clears background and reference checks. Confidentiality is carried in their employment contract, and access is provisioned by you and revoked by you.
GDPR for EU and UK work
Personal data is handled to GDPR requirements, with data processing terms agreed before onboarding. Access is limited to what the role actually needs, and residency and retention are agreed per engagement rather than assumed.
Worth the call, or worth an early no
Custom is the wrong answer to plenty of good problems. Here is where we say so.
This works well if
- A package covers most of your process, and the part it misses is the part that makes you money.
- The business runs on spreadsheets that three people understand and nobody has documented.
- You have a system that still works and can no longer be changed without breaking something.
- The software is the product, and the roadmap is going to run for years rather than months.
This is not a fit if
- A configured SaaS product would genuinely do the job. We will tell you which one, and we would rather say it on the first call.
- You want it in six weeks and the scope is not negotiable. One of those two has to move, and we will not pretend otherwise.
- You are still validating the idea. Ask about MVP development instead, which is a smaller and cheaper question.
- You need engineers to slot into a team you already run and direct. That is staff augmentation, and it costs less.
Answered without the hedging
Still deciding?
Send us the workflow and the systems it has to talk to. We will tell you honestly whether a custom build is the right shape for it, including when it is not.
Book a Discovery CallWhat is custom software development?
How is custom software different from off-the-shelf software?
How much does custom software development cost?
How long does custom software development take?
Who owns the code and the intellectual property?
What is the custom software development process?
What happens when the scope changes mid-project?
Can you work with our existing codebase and team?
What happens after launch?
Is offshore custom software development secure?
Tell us what it has to do
No pitch, no obligation. Send us the workflow and the systems it has to talk to. You get a scope range, an architecture opinion and a cost band. If a product off the shelf would do the job, we will name it.