Choosing guide

How to choose a software development agency

Run every agency through five tests. Do they challenge your scope instead of just quoting it? Do the senior people who pitched stay after the sale? Does the contract match how certain your scope actually is? Can they show software they shipped, not just slides? And do they leave you code your own team can run without them?

Book a thirty-minute call

Short answer

Judge agencies on five tests: scope challenge, senior continuity, contract fit, shipped proof, and clean handover.

Best for

  • Founders hiring an agency for the first time
  • Buyers comparing several pitches that all sound the same
  • Teams that need to own the code afterward
  • Anyone burned by a previous agency

Not for

  • Buyers who only care about the lowest bid
  • Quick one-off tasks better suited to a freelancer
  • Teams with no internal owner for the relationship
// 01

Compare the options

What to look for, and what should make you walk.

Test Green flag Red flag
Scope

They challenge and tighten your scope

They quote your scope back without question

Senior continuity

The people who pitch do the work

Seniors sell, juniors build

Contract

Fixed price for locked scope, retainer for uncertain

One rigid contract for every project

Proof

Live products and case studies you can inspect

Slides, logos, and vague claims

Handover

You get clean code and docs your team can run

Lock-in: only they can maintain it

Communication

Direct answers, named owner

Account manager filters every reply

// 02

Where Wavect lands on this

Check the role before comparing agency proposals

Write down the missing responsibility first:

  • A defined product needs building: commission a delivery team, with someone on your side able to set priorities and accept the work.
  • An existing engineering team needs technical direction: consider a fractional CTO for architecture, technical risk and delivery oversight. An agency can still implement the work.
  • The product roadmap lacks direction: clarify product leadership before buying more development. A product manager may lead a product area; a fractional CPO may own broader strategy and priorities when part-time leadership fits the company stage.

Agree decision rights, daily execution and acceptance explicitly. The same provider can fill several roles, but the proposal should name each responsibility. Our existing guides cover when to hire a fractional CTO and fractional CPO versus product manager. For an internal automation brief, use AI automation procurement.

The pitch is the easy part. Every agency can write a deck. The five tests exist to find out what happens after you sign.

Ask who will do the work after signing and how your team will take over. Name the technical lead, confirm allocation and substitution terms, and make handover a testable deliverable.

We staff senior people end to end, and we hand over code your team can run without us. If an agency cannot tell you exactly who builds and how you take ownership, that is the signal. If you are weighing us against a typical dev shop, here is how Wavect compares.

Still weighing a three person studio against a forty person shop? Size is a separate test from capability, and the delivery research does not favour the bigger org. Our breakdown of how big your software partner should be covers the team-size evidence and the four clauses that make a small partner safe to hire.

Already shortlisted the agency and received its paperwork? The decision has moved from who to hire to what you are signing. Use the software agency proposal teardown to inspect the twelve clauses that move price, scope, security and ownership.

Ask the proposed team to walk through one sensitive workflow

Pick a workflow with a real data dependency and ask the engineers named in the proposal to explain where the data goes in development, testing and production. Record who gets access, which subcontractors and tools may receive it, who reports an incident, and how the agency will hand back or delete the data. If the agency processes personal data on your behalf, compare that walkthrough with the processor terms and subprocessor authorisation in the contract. GDPR, Article 28

How should you compare software development partners in Europe?

Compare the delivery model and the evidence for your actual brief. A European address, an AI service page and a client logo answer different questions. For DACH procurement, keep Austria, Germany and Switzerland distinct and agree the working language. Wavect offers custom software delivery from Austria; this framework also works when you choose another provider.

Method, 27 October 2026: this is a desk review of four public service offers, selected to illustrate different buying models. It is a purposive sample, not a market ranking, quality test or survey. Public offers establish advertised scope; they do not establish your assigned team, signed rights or deployment configuration. Wavect publishes this analysis and is one of the suppliers included.

The sample compares particular offers, not each supplier’s full capabilities.

Public offer inspected What it helps you evaluate Evidence to request for your engagement
Wavect software delivery

Wavect software delivery: A defined product milestone with senior technical involvement.

Named lead, acceptance tests, agreed scope and operating handover.

Netguru staff augmentation

Netguru staff augmentation: Specialists extending a team under the buyer’s management.

Role allocation, onboarding plan and who retains product decisions.

STX Next AI development

STX Next AI development: AI discovery, proof of concept and production development.

Real-data evaluation, production acceptance and model-operation ownership.

thoughtbot services

thoughtbot services: Product strategy, design and development alongside a client team.

The first product decision, assigned disciplines and knowledge-transfer plan.

These are vendor descriptions, not independent endorsements. A service named on a website is not proof of an identical engagement. Compare the same brief in writing, including recurring costs, external licences, support, exit and the rights your receiving team needs.

Download the blank evidence worksheet (CSV).

Copy one worksheet per supplier. Record the exact source or proposal section, date checked, responsible person and unresolved question. Use public offer, contract-confirmed, demonstrated or unknown as evidence states. A blank cell is unknown, not a failed test. Do not total the states into a league table. A critical unresolved dependency needs an answer before contracting, regardless of other strengths.

For example, MyMerch supports targeted changes to an existing operation; PromptID supports AI-product implementation under a constrained delivery window. Neither case establishes your future performance, data location or assigned staffing. For the provider-specific decision, use our disclosed Wavect and Netguru comparison. Discuss your first milestone with the same evidence requirements.

Match the evidence to the risk you are buying down. Aniron describes Wavect’s product-engineering contribution around AI API access, alongside the client team. Ehrenberg describes archive organization with human review, uncertainty handling and handover. Neither establishes an accuracy benchmark or a completed cloud migration.

Cedars describes documentation, QA and a separate assessment phase, without publishing reports or claiming certification. Enya Finance describes connected lending workflows for Enya Labs, not verified financial performance. Technofix describes a narrowly scoped smart contract delivery with a public mainnet reference; the 48-hour timing is Wavect-reported, not a future delivery guarantee or independent audit. These cases supplement MyMerch and PromptID without establishing a common customer geography.

Reuse and maintenance: the blank worksheet is Wavect’s original procurement aid, offered under CC BY 4.0. Attribute Wavect and link to this guide; third-party source material is excluded. Version 1.0, 27 October 2026. Method owner: Kevin Riedl. Recheck vendor descriptions before reuse and when an offer changes. Send corrections through our contact page.

// 03

Cost, risk and timeline

First step Discovery sprintWavect’s fixed EUR 3,500 engagement to scope your build
Biggest risk Bait and switchSeniors sell, juniors build the real thing
Delivery evidence Inspectable workAsk what the proposed team built and what the client can verify
// 04

Where this usually goes wrong

  • Buying the pitch instead of the team that does the work
  • Accepting a scope quote with no challenge or questions
  • Signing a rigid contract when the scope is still moving
  • Trusting logos and slides instead of inspecting shipped products
  • Ignoring handover until the project ends and you are locked in
  • Letting an account manager sit between you and the engineers
// 05

The checklist

Put every agency through this before you sign.

Tick items off as you go. Nothing is stored or sent.

// 06

What this looks like in our work

These are products you can inspect, with real timelines, not logos on a slide.

These are selected projects, not our full portfolio. We have shipped 100+ products since 2018.

// 07

When this fits, and when it does not

// 01

When Wavect is the right fit

  • You want senior people on the work, not just the pitch
  • You expect an agency to challenge your scope
  • You need to own the code afterward
  • You value direct answers over account-manager filtering
// 02

When we are not the fit

  • You are choosing on lowest bid alone
  • The job is a small one-off a freelancer can handle
  • You have no internal owner for the relationship

If you are still weighing an agency against other options, compare them head to head next.

// 09

FAQs

Run five tests: do they challenge your scope, do senior people stay after the sale, does the contract match your uncertainty, can they show shipped products, and do they leave you code your team can run.
Seniors who sell but juniors who build, scope quoted back with no challenge, slides instead of live products, one rigid contract for every project, and a handover nobody will explain.
Who actually writes the code? Can I inspect a product you shipped? What does the handover include? Why this contract for my scope? Who is my named technical contact?
Ask what the handover includes before you sign. You should get clean code and docs your own team can run. If only they can maintain it, that is lock-in by design.
No. Low bids usually mean junior hands and rework. Judge on the five tests and total cost to a working product, not the headline price.
Book a thirty-minute call