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Onyx
✓For providers · 22% acceptance

Get vetted. Get the mandates that mean something.

Onyx lists 182 service providers across five disciplines — audits, compliance, tokenomics, training, growth. Listing is editorial: we review your work product, we call your clients, and we publish what we find. One in five applicants makes it in.

Apply to be listed See pricing → 14 days to decision · fixed fee
Vetted providers
182
across 5 service categories
Mandates via Onyx
1,408
completed · trailing 12 months
Median engagement
$84k
smart-contract audit category
Acceptance rate
22%
published quarterly · Q2 2026
Why providers apply

Demand that arrives already qualified.

Every lead from Onyx is a project mid-application or mid-remediation — teams that already know what they need, with budget approved and evidence requirements in hand.

Qualified demand

Leads come from projects working through our methodology — they arrive with a scoped need ("we lose 4 points without a second audit"), not a cold inquiry.

1,408 mandates · 12 mo

A credential with teeth

The Vetted stamp is earned by work-product review and reference checks — and it's revocable. That's exactly why it carries weight with the projects you want.

22% accepted · delistings published

Reviews that convert

Client reviews on your profile are verified against completed engagements. Prospects trust them because they can't be bought, planted, or deleted.

142 reviews · Halborn profile

Editorial context

Your profile carries our honest read — "what we like, what to know." It filters out bad-fit inquiries before they reach your inbox.

Written by the Onyx desk
How vetting works

Listing is editorial, not commercial.

The application fee is fixed and does not affect outcome. We publish the acceptance rate quarterly so you can hold us to it.

1
Day 1 — 3

Apply with work product

Firm details, jurisdictions served, three redacted engagement deliverables, five named client references.

2
Day 4 — 9

Work-product review

A domain reviewer reads your deliverables the way your clients should have. Depth, specificity, and honesty are what score.

3
Day 10 — 12

Reference verification

We call each named client directly. You don't see what was said. Quotes are published only with permission.

4
Day 14

Decision & listing

Accepted providers go live with editorial context. Rejections get the reasons in writing. Re-apply after 180 days.

What listed providers say

The stamp does the selling.

Browse the marketplace →
The reference-check process was uncomfortable — they called clients we hadn't spoken to in a year. But that's precisely why the listing converts. Prospects arrive pre-sold because they know we couldn't have bought the placement.
Halborn Security
Smart-contract audits · Vetted 2024
142 reviews
Onyx leads close at three times the rate of our inbound. The projects come mid-application with a scoped need and a budget line — the qualification work is already done before the first call.
Meridian Compliance
Compliance & legal · Vetted 2025
38 mandates
FAQ

The questions every provider asks.

Does paying more improve our chance of acceptance? +
No. The application fee is fixed and identical for every applicant, and vetting is performed by the editorial team, who have no visibility into commercial conversations. Acceptance is determined by work-product quality, reference checks, and independence review — nothing else. The acceptance rate is published quarterly.

Think your work product holds up?

The application takes about 30 minutes if you have three redacted deliverables and five client references ready. Decision in 14 days, reasons in writing either way.

Start application Read vetting criteria
15 Screen — Provider pricing onyx.dev/for-providers/pricing
Pricing

Flat fees. No commissions.

Onyx never takes a percentage of mandates sourced through the marketplace. You pay a fixed application fee, then a flat annual listing fee if accepted. Vetting outcome is unaffected by tier — or by anything else you can pay for.

✓
Binding · Marketplace independence policy No fee, tier, or add-on affects vetting outcome, review content, or the editorial "what we like / what to know" sections on your profile. Acceptance is editorial. Delisting is editorial. Both are published.
Application fee $2,500 Fixed, non-refundable, identical for every applicant. Covers work-product review and reference verification whether or not you're accepted. Paid once per application.
Listed
$8,400 /year

The standard listing. Full profile, verified reviews, editorial context, inbound consultation requests.

✓Vetted stamp · profile page
✓Verified client reviews + right of reply
✓Editorial "what we like / what to know"
✓Consultation request routing
✓Annual re-review included
—No lead analytics
—No sample-work spotlight
Apply · Listed →
Priority
$18,000 /year

For firms where marketplace leads are a real channel. Analytics, faster routing, richer profile.

✓Everything in Listed
✓Lead analytics · source, stage, close rate
✓Sample-work section · published reports
✓Named-team section on profile
✓Response-time SLA badge eligibility
✓API access · lead webhooks
Apply · Priority
Partner
Custom /scoped

For multi-discipline firms listed in two or more categories, or firms with 20+ Onyx-sourced mandates a year.

✓Everything in Priority
✓Multi-category listing · one re-review
✓Quarterly methodology briefings
✓Co-publishable technical addenda
✓Dedicated marketplace contact
Talk to us →
Add-ons

Promotional placements — labeled "Sponsored", always.

Sponsored placements appear only on discovery surfaces — never inside your reviews, your editorial context, or the vetting record. They are visually distinct from the Vetted stamp.

Placement Where it appears Price
Category spotlight Sponsored
Top-of-list slot on your category page · max 1 per category
Never on provider detail, reviews, or comparison views
 $2,200 /month
Marketplace teaser · homepage Sponsored
One of two provider slots in the homepage marketplace teaser
Quarterly · Priority tier or above
 $9,000 /quarter
Newsletter co-op Sponsored
Sponsored section in The Onyx Brief · clearly demarcated
Reach: 14,820 subscribers · 1 per issue max
 $4,800 /issue

Independence note

Sponsored placement is restricted to discovery surfaces where the user is browsing, not where they are evaluating. Editorial staff who write provider context and conduct re-reviews have no visibility into which providers purchase placements. This is enforced at the access-control layer, the same way it is for rated projects.

16 Screen — Provider application · step 3 of 7 onyx.dev/for-providers/apply
Step 1 · Wallet connect

Applications are wallet-signed.

Connect your firm's wallet. Your application draft, references, and the final submission are all signed by it — the vetting record stays attributable end to end.

Vetting decision in writing by day 21
For providers/Apply/Work product

Apply to be listed · Meridian Compliance

Step 3 of 7 · last saved 1 min ago · draft signed by 0x8B1c…44aD
✓
Wallet connect
✓
Firm info
3
Work product
4
References
5
Team
6
Independence
7
Submit
Step 03

Work-product samples

This is the heart of the vetting. Upload three complete engagement deliverables from the last 18 months. Redact client identifiers if needed — we assess depth, specificity, and honesty, not logos. Marketing decks are the most common reason applications fail.

Primary service category
Client consent for samples

Deliverables · 3 required

PDF
VARA licensing memorandum · redacted
6.2 MB · uploaded 3 min ago
Received
PDF
MiCA white-paper compliance review · redacted
11.8 MB · uploaded 5 min ago
Received
PDF
Token-issuer entity structuring opinion
3.4 MB · uploading…
82%
+ Drop additional files · or click to browse

Context for reviewers

What should we look for in these samples?
Honest framing helps. Reviewers read all three deliverables in full.
Typical engagement size
Typical lead time
Auto-saved · changes signed by your wallet
17 Screen — Submit confirmation onyx.dev/for-providers/apply/submitted
✓

Application received.

Your submission has been signed by your wallet and queued for vetting. A domain reviewer will be assigned within 48 hours; expect reference calls to begin around day 10. Decision in writing by day 14.

Reference 2026-P0217 · tx 0x3e8f…a2c1 ↗
Next · within 48h

Reviewer assignment

A domain reviewer is assigned to read all three deliverables in full.

Days 10–12

Reference calls

We contact your five named clients directly. You won't see what was said.

Day 14

Decision in writing

Accepted: profile goes live with editorial context. Rejected: reasons keyed to criteria.

View application status Read vetting criteria