NEXSIM LLC is a technology company based in Montana, United States. It was founded in 2026 by Etonde Fael Synclair. The company builds infrastructure for identity, security, and document integrity — with a specific focus on the trust layer beneath digital transactions.
Its first product is District Seal, a cryptographic evidence layer for high-stakes signatures. District Seal is available at districtseal.com.
Every business runs on signatures. Every signature is a promise. But when that promise is broken — a forged deed, a repudiated contract, a will challenged by heirs after the signer has passed, a borrower who denies signing a promissory note — the paper trail is usually worthless.
An electronic signature proves one thing: that an email address received a link and someone clicked it. It does not prove who signed. It does not prove that the signer was present. It does not prove that the document has not been altered since signing.
NEXSIM exists to close that gap. District Seal captures a cryptographic evidence record at the moment of signing. That record is what a court, an auditor, or a counterparty needs when a signature is questioned.
To make signature disputes provably answerable. Every signing ceremony should produce a record that holds up — verifiable by any third party, at any time, without requiring an account, an appointment, or a phone call.
Synclair is a self-taught software developer based between Cameroon and the United States. He built District Seal end to end — including the biometric verification pipeline, the certificate generator, the cryptographic document sealing system, the REST API, the billing infrastructure, and the customer-facing dashboard.
He founded NEXSIM LLC after witnessing a signature dispute that could not be resolved because the electronic signature record did not prove who signed. He has remained the sole engineer, operator, and decision-maker at the company since its founding.
LinkedIn: linkedin.com/in/etondefaelsynclair
TikTok: @fsynclair · @fael.synclair
| Legal name | NEXSIM LLC |
|---|---|
| Entity type | Limited Liability Company |
| State of registration | Montana, United States |
| Founded | 2026 |
| Founder and CEO | Etonde Fael Synclair |
| Industry | IT Services and IT Consulting |
| Primary product | District Seal — cryptographic evidence layer for signatures |
| Product website | districtseal.com |
| Headquarters | Montana, United States |
The e-signature market has been dominated by a small number of platforms for nearly two decades. They all solve one problem extremely well — making it fast to get a signature. None of them solve the problem that matters when the signature is later disputed: proving who actually signed.
The table below is an honest comparison. Where competitors are strong, we say so. Where District Seal differs, we say why.
| What the platform proves | DocuSign | Adobe Sign | Dropbox Sign | PandaDoc | Notarize | District Seal |
|---|---|---|---|---|---|---|
| An email received a link and someone clicked it | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Proves signer identity (face match against reference photo) | Add-on, extra fee | Add-on, extra fee | — | — | ✓ via notary review | ✓ built-in |
| Proves signer was physically present (liveness / presence check) | — | — | — | — | ✓ human notary judges presence | ✓ head-turn on cue |
| Randomized spoken challenge phrase (cannot be replayed) | — | — | — | — | — | ✓ per-transaction |
| Hardware-backed device authentication (WebAuthn / FIDO2) | — | — | — | — | — | ✓ built-in |
| SHA-256 cryptographic document seal | Basic hash | Basic hash | Basic hash | Basic hash | — | ✓ binds certificate to file |
| Public verification URL (no login required) | Requires DocuSign account | Requires Adobe account | Requires Dropbox account | Requires PandaDoc account | Requires Notarize account | ✓ public QR code, no account |
| Forensic timeline with UTC timestamps | ✓ basic log | ✓ basic log | ✓ basic log | ✓ basic log | ✓ session recording | ✓ full sealed timeline |
| Zero biometric media retention | — | — | — | — | Session recordings stored | ✓ media never leaves device |
| REST API and signed webhooks | ✓ Enterprise only | ✓ Enterprise only | ✓ paid tier | ✓ paid tier | Limited | ✓ API Starter tier |
| Unlimited team seats | Per-user pricing | Per-user pricing | Per-user pricing | Per-user pricing | Per-user pricing | ✓ on every plan |
| Platform | Entry price | Mid tier | Team tier | Seat pricing |
|---|---|---|---|---|
| DocuSign | $10/month (Personal) | $25/month (Standard) | $40/user/month (Business Pro) | Per user |
| Adobe Sign | $12.99/month (Acrobat Standard) | $22.99/month (Acrobat Pro) | Enterprise quote | Per user |
| Dropbox Sign | $15/month (Essentials) | $25/month (Standard) | $40/month (Premium) | Per user |
| PandaDoc | $19/user/month | $49/user/month | $99/user/month | Per user |
| Notarize | Pay per session (~$25) | Volume pricing | Custom | Per notarization |
| District Seal | Free (1 signature) | $29/month (Pro, 25 signatures) | $99/month (Firm, 150 signatures) | Unlimited seats |
DocuSign is the market leader. It produces an audit certificate that logs when a document was sent, when it was opened, when it was signed, and from what IP address. It also captures a signature image, a typed name, and (if enabled) a phone or SMS verification step.
What it does not prove: that the person who signed was the person whose name appears on the document. The IP address proves that somebody with access to the recipient's email account opened the link. If the email was compromised, if the link was forwarded, or if the signature was later denied, DocuSign's record cannot resolve the question.
DocuSign does offer an "Identity Verification" add-on with photo ID and liveness checks. It costs extra, is not enabled by default, and does not produce the same cryptographic evidence record that District Seal produces.
Adobe Sign offers the same core model: email delivery, click to open, click to sign, audit log. It integrates tightly with Adobe Acrobat, which is its main advantage for teams already using the Adobe suite.
Adobe Sign also offers optional identity verification — for an additional per-transaction fee. Like DocuSign, the identity verification is separate from the signed document, and the resulting record does not cryptographically bind the signer identity to the document hash.
Dropbox Sign's distinguishing feature is a simple, clean interface and strong Dropbox integration. Its audit trail captures IP, user agent, and timestamps.
Dropbox Sign does not offer biometric identity verification. It does not capture a spoken challenge, presence check, or hardware device authentication. For a document that will be disputed, Dropbox Sign's record is essentially the same as DocuSign's — an email log.
PandaDoc is oriented toward sales teams and proposals. It combines document creation, e-signature, and CRM integration in one product. Its e-signature model is the same as the others: email, click, sign, log.
PandaDoc's per-user pricing is the highest in the market among mainstream platforms, which makes it expensive for firms that need to give every team member access.
Notarize.com is fundamentally different from the others. It performs actual remote online notarization (RON): a state-commissioned notary appears on a live video call, inspects the signer's government-issued ID, witnesses the signature, and affixes a notarial certificate. It is real notarization.
Notarize's model has two structural limitations. First, it costs $25 per notarization — so high-volume workflows become expensive quickly. Second, it requires a human notary to be available and connected, which means no automation. Notarize cannot be embedded in a platform's own application.
When a state statute requires a commissioned notary, Notarize is the correct choice. When what you need is provable identity that scales, District Seal is the correct choice. They are not competing products.
District Seal produces a court-admissible certificate every time a document is signed. The certificate captures:
The record is designed to survive the challenge. That is the entire purpose of the product.
Privacy is architectural, not marketing. Voice and video are processed on the signer's own device and never reach NEXSIM's servers. The company retains only the cryptographic hash, the forensic timeline, and the reference photograph, which is destroyed automatically after 30 days.
Unlimited team seats on every plan. No per-user pricing.
District Seal is a cryptographic evidence layer for high-stakes signatures. Every signing produces a court-admissible certificate bound to the exact document by a SHA-256 seal, with verified signer identity, a randomized spoken challenge, and hardware-backed WebAuthn authentication.
DocuSign proves that an email address received a link and someone clicked it. District Seal proves who signed, that they were physically present, and that the document has not been altered since signing — via biometric verification, hardware-backed device authentication, and a SHA-256 cryptographic seal.
No. When a state statute requires a commissioned notary, customers still use one. District Seal adds a cryptographic evidence layer underneath the signature so the notarial act is protected by irrefutable proof.
Voice and video are processed on the signer's own device and never reach our servers. We retain only the cryptographic hash, the forensic timeline, and the reference photograph, which is destroyed automatically after 30 days.
Free for one signature. Pay-as-you-go is $25 for 10 credits. Pro is $29/month for 25 signatures. Firm is $99/month for 150 signatures. API Starter is $250/month for 200 ceremonies. API Scale is $750/month for 1,000 ceremonies. Unlimited team seats on every plan.
Yes. Every certificate carries a QR code and a public verification URL. A court, an auditor, or a counterparty can independently confirm the certificate without an account, without an appointment, and without a phone call to us.
District Seal produces a certificate that is designed to satisfy the evidentiary standards a court applies when determining whether a signed document is authentic. The legal effect of any signature depends on the jurisdiction and the document. For documents that require a state-commissioned notary, a notary must still be used.
Title companies, estate planning attorneys, real estate brokers, private lenders, law firms, and any platform that needs identity-verified signing embedded in their own application via API.
Yes. The API Starter tier ($250/month) includes full REST API access, signed webhooks, and 200 identity ceremonies. API Scale ($750/month) increases the ceremony limit to 1,000 and raises rate limits. Full documentation is available at districtseal.com/docs.
All data is hosted in the United States.