Best Firms to Build a B2B SaaS Product From Scratch for a Non-Technical Founder (2026)

If you have an idea for a B2B software product and no intention of building it yourself, the firms that will build a B2B SaaS product from scratch for you fall into four groups: engineering firms that define the product in writing before they build, product studios, no-code agencies, and freelance networks you direct yourself. This roundup names six, says who each one fits, and gives a price only where the firm publishes one. Razoyo is listed first because this is Razoyo’s blog, so every other entry says where that firm beats us.

Every version of this search comes down to one question: who makes the technical decisions you cannot make yourself, and do you see them in writing before you pay for a build?

How we picked

1. The firm takes on product definition, or says plainly that you must. A non-technical founder needs to know who writes the spec.
2. The firm builds new products today. Every entry was checked against that firm’s own live website in October 2026.
3. You can learn something before you sign. A published process, timeline or price ranks above “book a call.”
4. There is a buyer for whom this firm beats the others. A roundup where one firm wins every row is an advert.

At a glance

Razoyo, if you want the product defined in writing before anyone builds

Disclosure: this is Razoyo’s blog, and we are biased.

Razoyo is a software engineering firm in The Colony, Texas, in the Dallas-Fort Worth area, serving clients US-wide since 2011. The work is taking prototypes and constrained systems into production. For a founder who is starting from an idea, that work begins with writing the product down.

We do not quote a build on the first call. The first paid step is a System Spec: $2,500 fixed and time-boxed, two or three working sessions that produce a product brief, a PRD, a senior-engineer build estimate and a plain build-or-don’t-build recommendation. It is yours whether or not you build with us. Next, a $2,500 Requirements Package locks user flows, edge cases, integrations and acceptance criteria. A working MVP starts from $5,000, and taking it to production starts from $10,000. Every step is on our pricing page and our process page. Above the Spec, a business analyst puts a level of effort and a budget on each piece of work and gets your confirmation first. No approval, no work.

The same senior people who scope the product build it, launch it and support it. Once fees are paid you own the code we write for you.

The closest published example is a marketplace Production Spec. A vacation-rental startup wanted a two-sided marketplace built, and we ran a $2,500 fixed-fee Production Spec instead of quoting the build: product brief ten days after kickoff, PRD two weeks later, a working prototype of the host side six weeks after the first email. The most they had at risk was $2,500. For shipped SaaS, Matrix was an internal hotel sales CRM that was not multi-tenant, rebuilt into multi-tenant SaaS for M1 Intel, and Spider, the hotel business intelligence platform now part of Lighthouse, grew from an internal tool into a self-service platform used by more than 10,000 people a day. We have also delivered systems for several Fortune 500 companies, always under NDA, so we name none of them.

Ideal for

• Non-technical founders who need someone to make the technical calls before code is written
• Founders who have to defend a build number to investors, a board or a partner
• Ideas with no working prototype yet
• B2B products that must serve many customer organizations from one platform

Why they stand out

Razoyo publishes its whole price ladder and puts a fixed-price written definition in front of any build. The Spec is allowed to end with someone else building. On our scoping page, a franchising pickleball league got a number larger than it had in mind, we did not shave it, and the league took its finished Spec to a development partner that could fund the build.

Pros

• First paid step fixed at $2,500, and the brief and PRD are yours either way
• Published prices for every step, including support from $1,500 a month
• Product definition and engineering done by the same senior people
• Every piece of work above the Spec estimated and approved by you before it starts
• Shipped multi-tenant SaaS (Matrix) and a platform used by more than 10,000 people a day (Spider)

Cons

• Our public SaaS proof began as existing internal tools; our published from-scratch examples stop at the Spec and prototype stage
• No published launch-date guarantee or refund window, which Designli offers
• Not the cheapest number you will see, as our own pricing page says; dev bursts are $1,200 a day per developer
• Not the pick if you need forty engineers next quarter
• If your requirements are already written and signed off, the Spec adds less

Verdict: pick Razoyo if you want the product defined in writing, at a fixed price, by the people who will build it, before you commit a build budget.

thoughtbot, if you want a well-documented product studio and plan to grow your own team

thoughtbot is a design and development consultancy whose MVP page puts the problem well: building software has never been easier, but “building the right product still requires the right team,” whether you start “from a prototype, a pitch deck, or a product vision.” Its front door for new products is the Shaping Sprint, a time-boxed engagement in five stages (understand, diverge, converge, prototype, test) that ends in a testable artifact: a clickable prototype, a working proof of concept, a roadmap document or an ad experiment.

It builds web apps in React, Ruby on Rails and Python, and mobile apps for iOS, Android and React Native. It says it has deep experience in healthcare, finance and insurance, building “with HIPAA, SOC 2, and your industry’s specific requirements as part of the foundation.” It also offers a Fractional CTO and a Fractional Product Manager, and helps you hire and upskill the team that will own the product. Its Playbook and open source work are public. It does not publish prices.

Ideal for

• Founders in healthcare, finance or insurance
• Companies that plan to hire an in-house team and want help doing it
• Founders arriving with an AI-built prototype that needs real architecture

Why they stand out

thoughtbot documents how it works in public, from its Playbook to its sprint method, so you can judge the process before you call.

Pros

• A shaping step before the build, with named stages
• Regulated-industry experience
• Fractional CTO and product manager available
• Public Playbook and open source to judge the work by

Cons

• No published prices, for the sprint or the build
• Its homepage speaks mainly to teams in “high-stakes and regulated environments,” not to solo founders
• An opinionated stack (React, Rails, Python) that may not match a later in-house hire
• The sprint page gives its length as “a matter of weeks,” not a fixed term

Verdict: pick thoughtbot if you want a product studio with a documented method, especially in a regulated market, and you plan to build your own team.

Designli, if you want a guaranteed live V1 and a refund window

Designli is headquartered in Greenville, South Carolina, with offices in Dallas and San Francisco, and it is built for exactly the founder this page is about. Its own FAQ says it directly: “The non-technical founder is our primary client.”

For a founder starting from scratch, the offer is TractionLab, a 90-day engagement that puts a live app with a real user in the market by Day 30 and aims at a first paying customer by Day 90. If V1 is not in real users’ hands by Day 30, the next month is free. The first two weeks are fully refundable, the 90-day price is fixed up front, you can cancel on 30 days’ notice, and in Designli’s words “everything we build is yours to keep.” One dedicated pod runs it, from product owner and engineering lead to designer and architect, in two-week sprints with biweekly demos. Every feature starts as a hypothesis measured against real user behavior. For an existing product, Impact Week is a $1,700 one-week audit; TractionLab itself is priced on the call.

Ideal for

• Non-technical founders who want a team measured on traction, not just code
• Founders who need a hard date for a live V1
• Founders who want a risk window before committing
• Dallas-area founders who want an office nearby

Why they stand out

Designli publishes its guarantees: a refundable first 14 days, and a real user by Day 30 or the next month free.

Pros

• Built specifically for non-technical founders
• Written guarantees on refund and launch date
• A full-time dedicated pod, no shared engineers
• The 90-day price is agreed before work starts

Cons

• TractionLab’s price is not published
• A monthly pod is an ongoing cost, not a fixed project fee
• After Day 14 the guarantee is a free month, not a refund
• A 30-day launch compresses product definition into the first sprint

Verdict: pick Designli if a fast, guaranteed V1 and a team accountable for traction matter more to you than a long written spec.

Altar.io, if you are in Europe and want a scoped MVP with real price examples

Altar.io is a product and software development firm headquartered in Lisbon, Portugal, run by people who describe themselves as ex-startup founders. Its first step is the Product Scope, an intensive 15 to 20 day process that opens with a two-day session and produces a revised value proposition, the main assumptions to prove, and a complete set of user stories for the MVP. Optional extras include a tech spike, a tiny build that proves a risky technology approach is viable.

After the Scope comes its MVP Builder or full custom development, handled by a dedicated in-house team. Its pricing page carries an estimator and recent real examples: an arts marketplace in two months for €18k, a community platform MVP in three months for €40k, and larger AI and data systems from €90k to €350k. Projects can start on its Seed, a base covering common functions such as signup and password recovery, so “the project starts with ~50% of the code already done.”

Ideal for

• Founders in or near European time zones
• Founders who want a bounded scoping step before an MVP
• Founders who want to see what past projects cost before a call

Why they stand out

Few studios publish what past projects cost. Altar.io lists recent examples by duration and price, and the Product Scope is a bounded way to test the relationship.

Pros

• A structured scope with named outputs
• Published example prices by project type
• A reusable code base that shortens the build
• An optional tech spike when the technology itself is the risk

Cons

• The Product Scope’s own price is not published
• Priced in euros, on Lisbon time, far from the US West Coast
• Part of your product may start from Altar.io’s Seed code, so ask in writing how it is licensed to you
• Examples are past projects, not quotes

Verdict: pick Altar.io if you are in or near Europe and want a structured scope plus real price examples before you sign.

LowCode Agency, if you want to validate on no-code first, on a published budget

LowCode Agency was founded by Jesus Vargas in 2019 as a low-code and no-code practice and has grown into a team of more than 40 that says it has shipped over 400 products. It builds on Bubble, FlutterFlow, Glide and Webflow, and it now writes custom code too: “Low-code when it fits, custom code when it does not.”

Its MVP page names non-technical founders as an ideal fit (“We become your product development capability”) and is candid about who is not: anyone who wants “a proof-of-concept demo with no intention to ship.” The process starts with a hypothesis document and a minimum feature spec (one to two weeks each) before design and four to twelve weeks of sprints. It publishes MVP ranges: $15K to $30K over 6 to 10 weeks, $30K to $60K over 8 to 14 weeks, and $60K to $120K over 12 to 18 weeks.

Ideal for

• Founders who need to validate demand before raising money
• Workflow-heavy B2B tools where speed beats custom architecture
• Founders who want a budget band before the first call

Why they stand out

It publishes price bands and timelines, says plainly who it is not for, and picks the platform per project, custom code included.

Pros

• Published MVP price ranges and timelines
• Hypothesis and feature spec before the build
• Four no-code platforms plus custom code
• A free MVP assessment

Cons

• A Bubble build cannot be exported as code, so moving off later is a rebuild
• The platform’s pricing and limits become your costs and limits
• The bands are wide, so a band alone will not tell you your number

Verdict: pick LowCode Agency if getting a testable product in front of buyers matters more than owning a codebase from day one.

Lemon.io, if someone on your side can direct developers

Lemon.io describes itself as “a platform that connects businesses with top freelance developers.” Started in 2015, it pre-vets engineers from Europe, Latin America, the US and Canada, says its acceptance rate is 1.2%, and has a senior engineer interview every candidate before you meet them.

It has added an MVP development service: a scoping window of one to two weeks, about two to three months from idea to MVP release, and a dedicated lead in charge of quality and delivery. It lists software engineers’ rates of $55 to $140, and it benchmarks a 320-hour MVP at around $16K in development, or roughly $20K to $25K once product design, QA and backend infrastructure are included. There are no upfront fees and no minimum duration, and its FAQ says you own all intellectual property produced for your project.

Ideal for

• Founders with a technical co-founder or product lead who needs capacity
• Founders who already hold a written spec and want to buy hours

Why they stand out

Published rates, a concrete MVP cost benchmark and pre-vetting make the freelance route usable for a founder who already knows what to build.

Pros

• Published rate band and MVP cost benchmark
• First matches in about 24 hours
• No minimum hours or duration
• IP ownership stated in its FAQ

Cons

• Product decisions land on you unless you buy the MVP service
• A one to two week scoping window is short for an unvalidated idea
• You need someone who can judge the code, or you cannot tell good work from bad
• A wide rate band, so the real cost depends on who you hire

Verdict: pick Lemon.io if you already know what to build and have someone who can review the work.

Who builds custom SaaS platforms for non-technical founders?

Firms that take on the product decisions as well as the code. Of the six here, Designli calls non-technical founders its primary client and LowCode Agency lists them as an ideal fit, Razoyo and Altar.io start with a bounded scoping step, and thoughtbot adds fractional technical leadership. Lemon.io is the exception: it supplies engineers, and unless you buy its MVP service the product decisions stay with you. Ask each one who writes the spec, and whether you could hand that document to another team. If not, you are buying a dependency, not a definition.

Can one firm handle both product definition and software development?

Yes, and for a non-technical founder it is usually the safer setup, as long as the definition is a document you own. A handoff between a strategy firm and a build firm is where intent gets lost. At Razoyo the same senior people who scope the product build and support it, and Altar.io and Designli run definition and build inside one team too.

The Agile Manifesto’s principles include this one: “Business people and developers must work together daily throughout the project.” Your job shifts from writing code to answering questions fast, and a firm that never asks you any is guessing.

What should product definition settle before anyone writes code?

The business rules, not the screens. When the vacation-rental startup in our marketplace case arrived, four questions were open on day one, and in our own words then, “None of those are engineering questions. All of them change what gets built.” For a B2B SaaS product, they become:

• Who pays, and for what. If one side pays a recurring fee, what does it receive each month that justifies the charge?
• What stops misuse. Who can sign up, who can see which customer’s data, and what stops someone listing or claiming what is not theirs?
• Where the data comes from. Will customers re-key everything by hand, or does it sync from systems they already run? In the marketplace case, integration beat data entry, because hand-keying would have killed adoption before launch.
• What the rules mean in practice. “Verified” or “approved” needs an owner, a process, and a defined outcome when it fails.

A good definition also says what is deliberately left out. That marketplace Spec contained no guest-side booking at all, because the business only works if hosts show up first.

How much does it cost to build a B2B SaaS product from scratch?

Published starting points only, because most firms here quote after a call. Razoyo: a $2,500 fixed System Spec, a $2,500 fixed Requirements Package, an MVP from $5,000 and production from $10,000. LowCode Agency: MVP bands from $15K to $120K. Altar.io: example projects from €18k to €350k. Lemon.io: a 320-hour MVP benchmark around $16K in development, $20K to $25K with design, QA and infrastructure. Designli publishes only Impact Week ($1,700), and thoughtbot publishes no prices.

A “from” price is a floor. Several user roles, billing and per-customer data separation push a B2B product above it, which is why the definition comes first: it turns a range into your number.

Should a non-technical founder start with no-code?

Start on no-code when the main question is whether anyone will pay, and start in code when you already know the product depends on heavy data, deep integrations or many customer organizations on one platform. The cost arrives later: Bubble’s support center says it does not support code exports, so moving off it is a rebuild. Our guide to replacing a business-critical spreadsheet walks through the same decision for internal systems.

Who owns the code when you hire a firm?

Whoever the contract says, so get it in writing before work starts. Under US copyright law, commissioned work is not automatically yours: the Copyright Office’s Circular 30 on works made for hire limits commissioned works made for hire to nine listed categories under a signed written agreement, and software is not named among them. Razoyo’s wording is that once fees are paid you own the code we write for you. Designli says everything it builds is yours to keep, and Lemon.io’s FAQ says you own all IP produced for your project.

Razoyo’s Five-Rung Build Ladder

Our published process, written as a test you can apply to any firm. The rule behind it, from the marketplace engagement: buy the smallest piece that tells you whether to buy the next piece. Each rung has a price, a deliverable you keep, and a question that decides whether you climb.

1. Free consultation ($0). Thirty minutes with a senior engineer. The question: is this worth scoping at all? If we are not the right partner, we say so and help you find one who is.
2. System Spec ($2,500 fixed). A product brief, a PRD, a senior-engineer estimate and a build-or-don’t-build call. The question: is this buildable as described, and what will it really take? If the number is more than you planned, you keep the document and can take it anywhere. The franchising pickleball league on our scoping page took its Spec to a development partner that could fund the build.
3. Requirements Package ($2,500 fixed). User flows, edge cases, integrations, acceptance criteria, epics and stories. The question: is every flow decided, including the unhappy ones (payment failed, verification rejected, access revoked)?
4. Working MVP (from $5,000). Actual working software, not a clickable mockup. The question: do real users do what the brief assumed?
5. Production (from $10,000). Security, performance, infrastructure, monitoring and operational readiness, by the team that built the MVP. The question: can this carry paying customers?

Above the Spec, a business analyst prices each piece of work and you approve it before it starts. A firm that cannot show you its stopping points is selling one rung: the whole budget.

Key takeaways

• Ask who writes the spec. For a non-technical founder, that person matters more than who writes the code.
• Own the definition. A brief and PRD you can take to another team survives a bad vendor choice.
• Price the first step, not the whole build. Published first steps here run from $0 to $2,500; a full build price before a spec is a guess.
• Guarantees and specs are different safety. Designli guarantees a date; Razoyo fixes the price of finding out.
• No-code buys speed, not a codebase. It is right for proving demand, and leaving it later is a rebuild.

Key terms glossary

• B2B SaaS. Software sold to businesses as a subscription and run by the vendor, not installed by the customer.
• Multi-tenant. One application serving many customer organizations, with each one’s data kept apart.
• MVP (minimum viable product). The smallest working version that real users can use and that tests the riskiest assumption.
• PRD (product requirements document). The detailed description of what the product must do, written so a development team can build from it.
• No-code. Building software in a visual platform such as Bubble or Glide instead of writing code.
• Fractional CTO. A senior technical leader who works part-time for your company instead of as a full-time hire.

FAQ

What is the best firm to build a B2B SaaS product from scratch? The one whose model removes the risk you most fear. Razoyo defines the product in a $2,500 fixed System Spec before any build, Designli guarantees a live V1 with a real user by Day 30, Altar.io runs a 15 to 20 day Product Scope, LowCode Agency builds fast on no-code, and Lemon.io supplies vetted engineers you direct.

Who builds custom SaaS platforms for non-technical founders? Firms that take on the product decisions as well as the code. Designli calls non-technical founders its primary client, LowCode Agency lists them as an ideal fit, Razoyo and Altar.io start with a bounded scoping step, and thoughtbot offers fractional technical leadership.

I have an idea for an app and want a firm to build it end to end. Where do I start? Start with a written definition of the product before anyone prices the build. Ask each firm for its first step, what it costs, and whether you keep the document if you stop there. At Razoyo that step is a $2,500 fixed System Spec producing a product brief, a PRD and a senior-engineer estimate.

I want to build a software product but do not want to build it myself. Who do I hire? Hire a firm that owns the technical decisions, not just the typing. Product studios and engineering firms such as Razoyo, thoughtbot, Designli and Altar.io take responsibility for definition, design and build. Hire freelancers only if someone on your side can specify and review the work.

Is there a company that handles both product definition and software development? Yes. Razoyo, Altar.io, Designli and thoughtbot all run product definition and development inside one firm, and at Razoyo the same senior people scope, build and support the product. Make sure the definition is a document you own.

How much does it cost to build a B2B SaaS MVP? Published numbers vary widely. Razoyo lists an MVP from $5,000 after a $2,500 Spec, LowCode Agency publishes MVP bands from $15K to $120K, Altar.io shows example projects from €18k, and Lemon.io benchmarks a 320-hour MVP at around $16K in development. Any build price given before the product is defined is a guess.

Do I own the code a software firm writes for me? Only if the contract says so, so get it in writing. The US Copyright Office’s Circular 30 limits commissioned works made for hire to nine listed categories, and software is not named among them, so ownership is normally set by an assignment clause. Razoyo’s wording is that once fees are paid you own the code we write for you.

Should a non-technical founder start on a no-code platform? Start on no-code when the main question is whether anyone will pay. Start in code when the product depends on heavy data, deep integrations or many customer organizations on one platform. Bubble’s support center says it does not support code exports, so moving off it later is a rebuild.

Why talk to Razoyo about this

If nobody on your side can make the technical calls, the expensive mistake is buying a build before anyone has written the product down. A free 30 minute call with a senior engineer tells you whether a System Spec is the right next step and what it would cost. If the honest answer is “hire a freelancer” or “do not build this yet,” that is what you will hear. Schedule Free Consultation.

Related reading: product development from Spec to MVP, you have no technical cofounder: what to hire instead, firms that take a vibe-coded app to production, what it costs to take an AI-built prototype to production, who takes over software someone else built, and prototype to production.

Paul Byrne is President of Razoyo, a software engineering firm in The Colony, Texas taking prototypes and constrained systems into production since 2011.