Digital Securities Development Services for Security Token Platforms

SpaceDev designs and builds digital securities platforms for issuers, broker-dealers, transfer agents, and fintech companies that need compliant security token infrastructure in production, not a pilot. We cover the full stack: security token contracts, investor onboarding, ownership records that reconcile with your transfer agent, and the venues where your tokens trade.

Get in touch See our work

Or subscribe to our newsletter

What we deliver

What a Digital Securities Platform Requires, and What We Build

Security token contracts

ERC-3643 (T-REX) or ERC-1400 contracts with identity-bound transfers, freeze, forced transfer, and recovery functions.

Offering-aware compliance engine

Rules that enforce your issuance exemption: investor eligibility, holding periods, jurisdiction blocks, and per-investor caps.

Investor onboarding and accreditation

KYC/AML, accredited investor verification, wallet screening, and on-chain identity claims reusable across offerings.

Ownership registry and transfer agent sync

On-chain holder registry that reconciles with the official record kept by your registered transfer agent.

Primary issuance workflows

Subscriptions, stablecoin or fiat payments, allocation, and minting on settlement.

Corporate actions and distributions

Dividends, coupons, voting, splits, and redemptions executed on schedule and logged on-chain.

Secondary market connectivity

ATS integrations, permissioned liquidity pools, and OTC settlement with delivery-versus-payment.

Issuer and compliance consoles

Cap table management, investor communications, regulatory exports, and full audit trails.

Three Tokenized Security Models, and Which One Fits Your Platform

In January 2026, SEC staff published a Statement on Tokenized Securities that groups the market into three models. The model you choose determines your custody structure, investor rights, and where the tokens can legally trade, so it is the first decision we make with you.

	Issuer-Sponsored	Third-Party Custodial	Third-Party Synthetic
Who issues the token	The issuer or its agent	An intermediary holding the underlying security	An intermediary issuing its own instrument
What the holder owns	The security itself	An entitlement to the underlying security	Price exposure only
Eligible for the SEC Innovation Exemption	Yes, for listed US stocks	Yes, for listed US stocks	No
Typical builder	Companies, funds, transfer agents	Broker-dealers, custodians, fintechs	Offshore and crypto-native platforms

Who issues the token

Issuer-sponsored: The issuer or its agent

Third-party custodial: An intermediary holding the underlying security

Third-party synthetic: An intermediary issuing its own instrument

What the holder owns

Issuer-sponsored: The security itself

Third-party custodial: An entitlement to the underlying security

Third-party synthetic: Price exposure only

Eligible for the SEC Innovation Exemption

Issuer-sponsored: Yes, for listed US stocks

Third-party custodial: Yes, for listed US stocks

Third-party synthetic: No

Typical builder

Issuer-sponsored: Companies, funds, transfer agents

Third-party custodial: Broker-dealers, custodians, fintechs

Third-party synthetic: Offshore and crypto-native platforms

For US-facing products, issuer-sponsored and custodial models are the practical route, and they are the core of our digital securities work. Synthetic structures often qualify as security-based swaps, which limits who can buy them and where they can trade.

Compliance Built Into the Token, Not Bolted On

Issuance Exemptions Enforced at the Contract Level

Most digital securities are issued under Reg D, Reg A+, Reg CF, or Reg S, and each exemption brings its own rules: accredited-only access under 506(c), investment limits for non-accredited buyers under Reg A+, a one-year transfer restriction under Reg CF, US person blocking under Reg S. We implement these as offering-level rule sets, so several offerings can run on the same token infrastructure without manual overrides.

Transfer Restrictions That Execute Automatically

With ERC-3643, every transfer is checked against the holder's verified identity and the offering's rules before it executes. A non-compliant transfer simply fails, regardless of who initiates it.

Freeze, Forced Transfer, and Recovery

Regulated platforms must respond to lost wallets, court orders, and investor offboarding. We build these administrative controls with role-based permissions and a complete audit trail.

A Clear Official Record of Ownership

The token is not automatically the legal record. Depending on your structure, the official record lives on-chain, with a registered transfer agent, or in a synchronized model. We build the reconciliation layer that keeps both views consistent and flags discrepancies before they become compliance issues.

Secondary Trading for Digital Securities

On September 17, 2026, the SEC issued its Innovation Exemption, a five-year, conditional relief that lets Tokenized Securities Venues trade tokenized US-listed stocks through permissioned automated market makers and liquidity pools without registering as an exchange. Combined with existing ATS infrastructure, issuers now have more realistic liquidity routes than ever:

ATS integrations

For private placements and restricted securities.

Permissioned liquidity pools

For tokenized listed equities under the new exemption.

OTC and bilateral settlement

With atomic delivery-versus-payment for institutional trades.

Because the exemption is temporary and the rules are still evolving, we design the compliance layer so it can be updated without migrating your token contracts.

Digital Securities Tech Stack

Token Standards

ERC-3643 (T-REX) with ONCHAINID, ERC-1400, SPL Token-2022 with transfer hooks

Networks

Ethereum, Polygon, Avalanche, Base, Solana, permissioned EVM networks

Smart Contract Infrastructure

Solidity, Rust (Anchor), Hardhat, Foundry, OpenZeppelin, upgradeable proxy patterns

KYC/AML and Identity

Sumsub, Jumio, Onfido, accredited investor verification, Chainalysis or Elliptic wallet screening

Custody Integrations

Fireblocks MPC, Anchorage, Copper, Gnosis Safe multi-sig

Payments and Settlement

USDC and regulated stablecoins, fiat on-ramps, atomic DvP settlement

How We Build Digital Securities Platforms

Model and Pathway Scoping

We define the tokenization model, issuance exemptions, record-keeping structure, and target trading venues with your legal counsel and transfer agent. Our Product Discovery service can run this as a standalone engagement.
Compliance Rule Design

We translate each offering's legal requirements into documented rule sets your compliance team can review before any code ships.
Smart Contract and Identity Layer

We build the security token contracts, the on-chain identity registry, and administrative controls for freezes, forced transfers, and recovery.
Registry and Integrations

We connect the platform to your transfer agent, custodian, KYC providers, and payment rails, with reconciliation and exception handling.
Portals and Trading Connectivity

We build issuer and investor portals, corporate actions tooling, and the ATS, liquidity pool, or OTC integrations your distribution plan requires.
Security Review and Pre-Launch Audit

Every contract and integration goes through structured security review, with BlockAudit available for independent audits focused on compliance bypasses and privilege escalation.

Engagement Models

End-to-End Platform Delivery

One team owns architecture, contracts, integrations, and the product layer, from discovery to launch.

Team Augmentation

Senior smart contract and backend engineers join your in-house team through IT Staff Augmentation.

Architecture and Pre-Audit Review

For teams already building, we review token design, compliance logic, and upgrade paths before external audits.

Related Services for Digital Securities Projects

Stock Tokenization

Equity issuance, cap tables, and corporate actions on-chain

Bond Tokenization

Coupon automation, maturity logic, and T+0 settlement

Smart Contract Development

Audited ERC-3643 and ERC-1400 security token contracts

Web3 Compliance Development

KYC/AML, transfer restrictions, and regulatory infrastructure

Our Work in Action

Take a closer look at how our services have helped teams ship at scale.

See all work

WEB3

Bondi Finance

RWA fixed-income protocol.

View case study →

WEB3

ApeBond

On-chain OTC marketplace.

View case study →

Frequently Asked Questions

What are digital securities?

Digital securities are traditional securities, such as shares, bonds, or fund interests, issued or represented as tokens on a blockchain. They carry the same legal rights as their conventional equivalents, and securities laws apply in full. What changes is how ownership is recorded, transferred, and settled.

What is the difference between a security token and a crypto token?

A security token represents a regulated financial instrument, so transfers are limited to verified, eligible holders. A standard crypto token has no built-in eligibility controls. Standards like ERC-3643 add identity and compliance checks to every transfer.

Is an STO the same as asset tokenization?

A security token offering (STO) is the primary sale of a digital security. Tokenization covers the full lifecycle: issuance, the ownership registry, corporate actions, and secondary trading. We build platforms for the full lifecycle, not only the offering.

What does the SEC's Innovation Exemption mean for tokenized securities?

Issued on September 17, 2026, it gives qualifying Tokenized Securities Venues five years of conditional relief to trade tokenized US-listed stocks through permissioned liquidity pools without registering as an exchange. It covers issuer-sponsored and custodial tokens, excludes synthetic ones, and includes trading caps and transparency requirements.

Do we need a registered transfer agent?

In most US issuer-sponsored structures, yes, and many teams use the blockchain as a synchronized record alongside the transfer agent's books. We build the integration either way. Your legal counsel defines the structure; we do not provide legal or regulatory advice.

Should we build a custom platform or use a white-label solution?

White-label tools can take a single offering to market quickly. A custom platform makes sense when you run multiple exemptions or instruments, work with your own transfer agent and custodians, need control over fees and data, or plan to offer tokenization as a service to other issuers.

From Our Blog

Build Your Digital Securities Platform with SpaceDev

The rules for on-chain capital markets are being written now, and platforms built on rigid assumptions will need rebuilding as they change. We build digital securities infrastructure that enforces today's requirements and adapts to what comes next.

Talk to our team