What AngelList Stack is, in 2026
AngelList Stack is the integrated startup-formation + banking + cap-table platform from AngelList, built specifically for pre-Series-A founders using AngelList Venture for SAFE management and fund administration. The product bundles Delaware C-Corp incorporation, EIN application, business banking (partner-bank fintech), cap table + SAFE management, and payroll integration into one guided flow. The structural fit is founders who want consolidated setup rather than stacking Stripe Atlas + Mercury + Carta separately.
Founded as the AngelList startup-infrastructure product evolution around 2020, tied to the broader AngelList Venture ecosystem (SAFE rounds, fund administration, SPV management). The banking leg operates under a partner-bank fintech model with an FDIC-insured sponsor bank; AngelList itself holds no banking licence.
At a glance
Who AngelList Stack is for: Pre-Series-A founders incorporating a Delaware C-Corp who are using or plan to use AngelList Venture for SAFE rounds, SPV management, or fund administration. The structural fit is first-time founders prioritising integrated setup speed over best-in-class at each layer.
Who to avoid Stack for: Operators with operating-cash above $250K (Mercury / Brex / Rho / Grasshopper have higher sweep ceilings); LLC / S-Corp founders (Stack is C-Corp-only); engineering-led startups needing API write access on banking (Mercury IO / Grasshopper offer that); businesses with material treasury yield needs (no native treasury product comparable to Mercury Treasury).
Safety in one sentence: AngelList holds no banking licence; customer deposits at the partner-bank sponsor carry FDIC pass-through cover at the standard $250,000 ceiling with no multi-bank sweep program at the standard tier.
Bank structure & deposit protection
AngelList Stack operates under a partner-bank fintech model. AngelList itself does not hold a banking licence. Customer deposits sit at an FDIC-insured sponsor bank with pass-through cover at the standard $250,000 per depositor per ownership category under FDIC General Counsel's opinion 8. The structural distinction from Mercury, Brex, and Rho is that AngelList Stack does NOT operate a multi-bank sweep program at the standard tier — deposits above $250K are not automatically distributed across additional FDIC-insured banks.
For operating-cash balances above $250K, the structural recommendation is to either (a) structure across multiple banking relationships outside Stack, or (b) migrate the operating-cash leg to a platform with a higher sweep ceiling (Mercury at $5M, Brex at $6M, Rho at $75M, Grasshopper at $25M, or chartered direct banks). Many AngelList Stack customers run Stack alongside Mercury during the post-funding period: Stack for the cap table + SAFE management leg, Mercury for the operating-account leg above the $250K threshold.
The cap-table + SAFE-management leg operates under AngelList Venture's broker-dealer / fund administration regulatory framework, separate from the banking entity. SEC EDGAR filings for AngelList Advisors LLC document the broker-dealer side. This regulatory layer applies to the cap-table and SAFE-issuance flows but does not affect the FDIC protection regime on the banking deposits.
The fee schedule
| Item | Standard |
|---|---|
| Incorporation (Delaware C-Corp) | One-time fee + state filing fee |
| EIN application | Included in incorporation flow |
| Monthly bank fee | $0 |
| Domestic ACH (in / out) | Free, unlimited |
| Domestic wire (outgoing) | Standard sponsor-bank wire fee |
| International wire | Limited support; standard SWIFT corridor fees |
| Cap table + SAFE management | Per-document filing fees (SAFE issuance, share issuance, valuation) |
| Payroll integration | Per-employee monthly fee (varies by tier) |
The fee model is per-document for the cap-table layer and standard partner-bank fintech for the banking layer. The integrated value compounds with documented SAFE rounds and ongoing payroll usage; for founders not actively using AngelList Venture for SAFEs, the integration value is materially smaller.
Hands-on notes
The integrated setup flow is Stack's structural strength. A typical founder onboarding completes the Delaware C-Corp filing, EIN application, business-bank account opening, and initial cap-table setup in a single guided session over 1-2 business days. The equivalent friction at Stripe Atlas + Mercury + Carta separately is typically 2-3 weeks across three separate vendor relationships with their own KYC / KYB flows.
The banking product itself is intentionally minimal — checking account, Mastercard business debit, virtual cards, ACH + wire infrastructure. There is no Mercury Treasury equivalent for idle-cash yield, no Brex Empower equivalent for spend management, no Rho multi-entity consolidation. Stack's value is the integrated setup, not the depth of any individual leg.
Friction points: C-Corp-only restricts founders considering LLC structures. Single-bank FDIC at $250K is structurally tight for venture-funded startups with above-$250K operating cash post-funding. Customer support varies — AngelList's broader support quality varies by ticket volume and integration leg (banking vs cap-table vs payroll). International founders incorporating via Stack face the same OFAC + BSA / AML compliance reviews as direct Mercury / Brex applicants.
Caveats
C-Corp only. No LLC, S-Corp, or other entity types as of 2026. The C-Corp-only restriction aligns with AngelList Venture's SAFE-and-priced-round investing focus but excludes a large segment of founders considering LLC structures.
Single-bank FDIC at $250K. No multi-bank sweep program at the standard tier. For operating-cash above $250K, migrate the cash leg to Mercury / Brex / Rho / Grasshopper or structure across multiple banking relationships.
Banking leg is the weakest of the three. Stack's integrated value is the setup speed, not the banking product depth. Treasury yield, deep spend management, multi-currency, and API write access all require migrating to standalone platforms.
Tied to AngelList Venture ecosystem. The integration value compounds with documented SAFE rounds and ongoing AngelList Venture usage. For founders not actively using AngelList Venture, the standalone Stripe Atlas + Mercury + Carta pattern is structurally cleaner.
AngelList Stack vs. Stripe Atlas + Mercury + Carta
The structural comparison is integrated bundle (Stack) versus best-in-class layered stack (Atlas + Mercury + Carta). Stack reduces typical setup time from 2-3 weeks across three vendor relationships to 1-2 business days in one guided flow. The trade-off is depth at each layer: Stack's banking is single-bank FDIC; Stack's cap table is functional but less feature-rich than Carta at the priced-round-and-beyond stage; Stack's incorporation is Delaware-C-Corp-default rather than the more flexible state-and-entity selection of Stripe Atlas.
The structural decision pivots on founder priorities. For first-time founders prioritising integrated setup speed and planning to raise SAFEs via AngelList Venture, Stack is the structural fit. For founders prioritising best-in-class at each layer or planning to raise priced rounds beyond the SAFE stage (where Carta's cap-table sophistication compounds in value), Atlas + Mercury + Carta separately remains the structural pattern.
FAQ
- Is AngelList Stack a bank?
- No. Partner-bank fintech model with FDIC-insured sponsor bank. AngelList holds no banking licence.
- How does AngelList Stack compare with Stripe Atlas + Mercury + Carta?
- Integrated bundle vs best-in-class layered stack. Stack reduces setup time 2-3 weeks → 1-2 days; trades depth at each layer for setup speed.
- What entity types does AngelList Stack support?
- Delaware C-Corp only as of 2026. No LLC, S-Corp, or other entity types.
- Are AngelList Stack deposits FDIC-insured?
- Yes via partner-bank sponsor at the standard $250K ceiling. No multi-bank sweep program at the standard tier.
- When should a startup migrate from AngelList Stack to Mercury / Brex?
- When operating-cash exceeds $250K, when API access matters, or when treasury yield is needed. Many run Stack alongside Mercury during the migration period.
- Can non-US founders use AngelList Stack?
- Yes for Delaware C-Corp formation; same OFAC + BSA / AML compliance reviews as direct Mercury / Brex applicants.
Who AngelList Stack is for
Use AngelList Stack if you are a pre-Series-A founder incorporating a Delaware C-Corp and using or planning to use AngelList Venture for SAFE rounds, SPV management, or fund administration. The structural fit is first-time founders prioritising integrated setup speed (1-2 days vs 2-3 weeks across separate vendors) over best-in-class at each layer. The cap table + SAFE management leg compounds in value with active AngelList Venture usage.
Use Stripe Atlas + Mercury + Carta separately if you want best-in-class at each layer or you anticipate raising priced rounds beyond the SAFE stage where Carta's cap-table sophistication matters. Use Mercury alone if you want the deeper banking product without the integrated setup. Use Novo / Found / Lili if you are LLC / sole-prop rather than C-Corp. Migrate from Stack to Mercury / Brex / Rho / Grasshopper once operating-cash exceeds $250K or API write access becomes a structural need.
References
Primary-source list, with capture date 2026-05-18. AngelList Stack's pricing, sponsor-bank arrangement, and entity-type restrictions verified against the source URLs at decision time.
- AngelList Stack — Legal & terms
- AngelList Stack — Product overview
- AngelList Venture — broker-dealer + fund administration framework
- SEC EDGAR — AngelList Advisors LLC filings (broker-dealer side)
- Delaware Division of Corporations — C-Corp formation
- IRS — Form SS-4 EIN application
- FDIC BankFind — sponsor-bank lookup
- AngelList Stack — Cap table + SAFE management documentation
- AngelList Stack — Payroll integration documentation
- NVCA — National Venture Capital Association model SAFE template
A cobertura FDIC por transparência (pass-through) aplica-se por banco parceiro, não por fintech. Se mantiver fundos em várias fintechs tipo Chime que partilham o mesmo banco parceiro, o seu limite FDIC de 250 000 $ é agregado entre esses saldos. As detenções em cripto, o numerário de corretagem a aguardar investimento e as linhas de proteção contra descobertos NÃO estão segurados pela FDIC — verifique o tipo de produto antes de assumir cobertura. O Reg E confere direitos de responsabilidade limitada por transferências eletrónicas não autorizadas comunicadas dentro do prazo legal.