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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute“Trading platform” can mean charting software, an order-entry app for an existing broker, a full retail brokerage, or a venue that matches buyers and sellers. Each carries different legal and build decisions, so the first job is to pin down which one you are building. For a U.S. securities brokerage product, the regulatory question comes before the vendor question. If your business takes customer orders, handles customer cash or securities, or routes trades, you need to work out which entity must be registered for each step of the customer journey, and whether any part of that depends on a partner. A brokerage API provider can supply much of the technical stack, but the regulatory perimeter is set by what your business actually does, not by how the product is labeled.
This article covers U.S. securities brokerage. If your users are outside the United States, or your product touches other instruments such as digital assets, the starting map is different, and the steps below should be read as a checklist to take to counsel rather than a complete guide.
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Decide which trading platform you mean
The same phrase describes very different businesses, and each one raises a different first question.
| Type | What it does | Who places or routes orders | First regulatory question |
|---|---|---|---|
| Charting or analytics software | Displays prices, research, and analysis tools | Users, through a separate broker | Whether the product only supplies information or also recommends trades |
| Order-entry front end | Customer-facing app that sends orders to a broker | The broker that receives and routes them | Which entity is the registered broker, and who handles onboarding and reporting |
| Retail brokerage app | Opens accounts, holds customer cash and securities, and executes trades | Depends on the operating model | Broker-dealer registration, SRO membership, and customer protection duties |
| Alternative trading system (ATS) | Brings buyers and sellers together in one venue | Participants submit orders into the system | Broker-dealer status and the Form ATS filing timeline |
| Institutional execution tool | Routes orders to venues or algorithms on behalf of a broker | The broker, often with a white-label execution provider | Who determines routing, and who owes Rule 606 disclosures |
The rest of this article focuses on customer-facing brokerage apps, with notes on ATS and execution where they change the answer.
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Write the product boundary before you talk to vendors
Before you contact a developer or provider, write a one-page boundary statement that answers these questions:
- Which instruments will customers trade, such as equities or options?
- Which countries will users live in, and which will they be allowed to open accounts from?
- Are the users retail customers, institutions, or both?
- Does the service only supply data, or does it recommend trades?
- Who receives customer orders, and who routes them?
- Who holds customer cash and securities?
- Does the product bring multiple buyers and sellers together?
This is a scoping checklist drawn from how the SEC describes registration activity and ATS operation. It is not a legal test. Securities law can turn on what the operator actually does, so a product description written for marketing will not settle the question. Ask securities counsel to map your real design and business model to the applicable rules.
Map the regulatory perimeter
Broker-dealer registration
The SEC’s Guide to Broker-Dealer Registration states: “Most ‘brokers’ and ‘dealers’ must register with the SEC and join a ‘self-regulatory organization,’ or SRO.” The guide covers Form BD, SRO membership, state requirements, customer protection, books and records, financial responsibility, and anti-money-laundering obligations.
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Two caveats apply. The guide is dated 2009, so confirm current rule text before relying on any specific mechanic. It also says it is not comprehensive: firms must meet applicable SEC, SRO, and other requirements beyond those it summarizes. The guide suggests that firms may wish to consult private counsel familiar with federal securities laws.
A provider can document its own part of the customer flow. It cannot register your company or decide which registrations your model requires.
Alternative trading systems
An ATS is not simply an app label. According to the SEC guide, an ATS must first be a registered broker-dealer and must file an initial Form ATS at least 20 days before commencing operation. The guide also describes operating matters, including fair access, fees, system capacity, integrity, security, record keeping, and confidential treatment of trading information. If your product lets customers match orders with each other, treat these as design requirements from the first architecture review, not as items to address after launch.
White-label execution and Rule 606
White-labeling is often mistaken for a transfer of responsibility. SEC staff’s Rule 606 FAQ addresses white-label arrangements directly and says that using a third-party white-label execution service can involve routing discretion and responsibility for the disclosures required under Rule 606(b)(3), which concern order-routing information a broker provides to customers on request.
The practical questions are specific. Who decides the venues or algorithms? Who builds the routing disclosure? And who answers a customer who asks where an order was sent?
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Choose a build model
Provider documentation and founder discussions tend to use three broad models. The labels are not standardized, so treat them as shorthand and confirm the actual split in writing.
Model 1: Build the experience on a brokerage API
Your team designs the app, onboarding screens, and customer logic, and calls a provider’s APIs for the brokerage functions. DriveWealth describes API-based end-to-end brokerage infrastructure and several integration and funding models in its integration model documentation. Responsibilities vary by model, and the omnibus arrangement described below leaves more operational work with the client.
Model 2: Use a hosted or white-label offering
The provider runs more of the customer-facing and operational layer under your brand. Provider documentation does not establish a single standard for how far a hosted offering extends, so the boundary has to come from the contract and a written responsibility matrix.
Model 3: Build more of the stack yourself
You build or separately license the brokerage, trading, and post-trade components and take on more of the operational and regulatory work directly. This gives the most control and the largest set of responsibilities. Expect the heaviest demands on compliance, operations, and incident response.
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| Model | Your team builds | Provider covers | Main exposure |
|---|---|---|---|
| API-integrated experience | Customer app, onboarding flow, integration logic | Components the contract assigns, which may include onboarding, funding, trading, custody, clearing, or reporting | Duties that stay with you, which depend on the integration model |
| Hosted or white-label offering | Brand, front end, product rules | Broader operations, with scope set by contract | Dependence on the provider and the cost and difficulty of exit |
| Build most of the stack | Most brokerage, trading, and post-trade components | Only the specific components you license | Highest compliance and operations workload |
Whichever model you choose, get written confirmation of which party handles each of these functions:
- Account opening and identity checks
- Funding
- Order routing and execution
- Custody and clearing
- Statements, confirmations, and tax reporting
- Market data
- Customer service
- Regulatory filings
- Incident response
Who builds one?
Three kinds of parties appear in this space:
- A product or software development team builds the customer interface, the integration code, and internal tools.
- A brokerage infrastructure provider supplies APIs and some combination of onboarding, funding, trading, custody, clearing, or reporting, depending on its product and your contract.
- Your internal team owns the product, the integration, security and operations, and works with qualified legal and compliance advisers.
DriveWealth: lifecycle APIs and the omnibus split
DriveWealth describes APIs covering the investment lifecycle, as set out in its API introduction. Its omnibus setup documentation places several responsibilities with the client rather than the provider:
- Customer onboarding and know-your-customer checks
- Customer financial records
- Sourcing live market data
- Customer reporting
This is the clearest example in this article of why the integration model matters. The same provider can carry different duties depending on how you connect to it.
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Alpaca: Broker API for customer-facing brokerage
Alpaca documents a Broker API for building brokerage experiences around account opening, funding, and trading. Its broader API Platform documentation is useful when you compare scope across products. As with DriveWealth, these are the providers’ own descriptions of their offerings. They are examples, not endorsements, and not an exhaustive list of vendors.
Public provider documentation and SEC guidance do not establish typical team size, budget, or build timeline. Treat any figure you encounter as a quote to verify rather than a benchmark.
Compare providers on operational ownership
A feature list tells you what a provider can do. The more useful question is what it does on your behalf and what it leaves to you. The provider documentation cited here does not set out pricing, service levels, or comparative performance, so each of those is a question for the vendor rather than an assumption.
| Axis | Request from each provider in writing |
|---|---|
| Assets and jurisdictions | A supported instrument and jurisdiction matrix |
| Account model and funding | The account structure offered (individual, bulk, cashless, omnibus, or other) and the funding flows for each |
| Custody and clearing | Who holds customer cash and securities, and who clears trades |
| KYC and AML | Who performs identity verification, onboarding checks, and AML monitoring |
| Order entry, routing, and execution | Who routes, chooses venues, executes, and produces routing disclosures |
| Market data | Data source, redistribution rights, and costs |
| Statements, tax, and reconciliation | Who produces each document and who reconciles positions |
| Customer support | Who answers customer questions, and on what service levels |
| API and testing | API coverage, sandbox tools, and security controls |
| Resilience and incidents | Operational support, outage handling, and incident notification terms |
| Contract and exit | Minimums, pricing, implementation effort, and data portability on exit |
Validate before you commit
Use this sequence before signing with any provider:
- Request a responsibility matrix that assigns each function listed above to a named party.
- Ask for sample customer flows covering signup, identity verification, funding, the first trade, and a withdrawal, and mark every handoff between you and the provider.
- Obtain the supported jurisdiction and instrument matrix in writing.
- Obtain the full fee schedule, including minimums and implementation costs.
- Obtain service and incident terms, along with the market-data licensing details.
- List the compliance dependencies: which filings, registrations, and records the provider’s model relies on from your company.
- Agree on production approval criteria, meaning what the provider must confirm before your product goes live.
- Have securities counsel review the actual customer journey and the agreements.
Provider documentation shows that models differ. It does not prove that any particular arrangement fits your proposed product. The review of the real customer journey is what turns a vendor comparison into a decision you can defend.
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