Web Application & SaaS Development

Mostly Laravel and PHP or Node.js on the server, and React, Next.js or Vue in the interface. We choose the stack for the product and for the team that will support it, and explain the choice.

Yes. We first review the code and the infrastructure, then tell you what can stay and give an estimate for continuing the work.

Each account's data is separated in the data model and in the access rules, and this is covered by tests. The approach depends on the product: one shared database with strict separation, or separate databases for larger clients.

A fixed price works when the scope of a stage is clear. When the product changes with every round of user feedback, a dedicated team usually fits better: you pay for the team's time and set the priorities each cycle.

You do: the code, the designs, the documentation and the data are handed over to you under the contract.

Yes, we work with companies in Seattle, across the US and in Europe. Our specialists from Ukraine and Eastern Europe overlap 3 to 5 hours with Western Europe and 2 to 4 hours with the US East Coast, and they work well async.

A web application at Peretz Agency starts from $25,000. A large product is split into stages, and each stage gets its own estimate, so the budget is approved one stage at a time. An MVP to test an idea starts from $20,000, and the discovery phase that produces the stage estimates starts from $4,000. Cloud hosting, paid services and APIs are paid directly to the providers.

A focused internal tool can take three to four weeks; our own system for leads, projects and invoices took about a month. An MVP usually takes two to four months. A full product takes several months and goes live stage by stage. The discovery phase, which turns these ranges into dates for your product, takes two to four weeks.

Start with an MVP when the idea has not yet been tested on paying users: it costs from $20,000 and usually takes two to four months. Build the full product when the process is proven and the application has to carry more users, roles and integrations. If you already have a first version built with AI tools, an MVP Review, usually $3,000 to $5,000, shows what to keep, fix or rebuild before you commit the next budget.

Usually through a payment provider's billing, with plans, trial periods, plan changes and invoices built around it in the application. In the US, Stripe lists 0.7% of billing volume for Stripe Billing and, as a separate fee, 2.9% plus 30 cents per successful domestic card payment (Stripe, October 2026). Billing logic of your own makes sense when your pricing or B2B contracts do not fit the provider's model. Provider fees are paid by you directly.

Work after release is agreed separately. Support costs from $1,000 a month and covers fixes, security and framework updates, monitoring, and backups that are tested by restoring them. Infrastructure work on its own costs $50 to $70 an hour with a DevOps engineer, and a product that keeps growing can have a dedicated team from $8,000 a month.

The source code, the deployment commands, the server requirements, the rollback procedure and an AGENTS.md file that describes the structure, the rules and the commands of the project. With them your own developers, another vendor or an AI coding agent can continue the application without depending on us.