- Passthrough specializes in fast investor onboarding through smart forms and an open API, but does not provide internal fund accounting
- Carta offers deep cap table management and a large venture capital network effect, but generally requires using its bundled fund administration
- Carta works best with standardized templates, while Passthrough is built to accommodate customized legal language and side letters
- Both platforms automate KYC and AML, though through different mechanisms, instant automation versus a mix of software gates and internal review
- Avestor's Customizable Fund bundles formation, onboarding, and administration for managers who need more than a point solution
Selecting the right technology platform is one of the most important decisions for investment managers, syndicators, venture capital firms, and private fund operators. Modern fund management involves much more than raising capital, it includes investor onboarding, document management, compliance workflows, fund administration, reporting, and communication. Passthrough and Carta are two platforms frequently considered by emerging fund managers, and while both support private market operations, they were built with different primary audiences and have distinct strengths. Avestor offers a third option for managers who need bundled formation and administration alongside onboarding.
What Is Passthrough?
Passthrough is a software platform designed to simplify the creation and management of investment vehicles such as SPVs and private funds. It emphasizes streamlining fundraising and investor onboarding with digital workflows, including digital subscription documents, electronic signatures, capital raising workflows, document storage, and compliance workflows. Passthrough is commonly evaluated by sponsors launching SPVs, syndications, angel investment vehicles, and smaller private funds. Notably, Passthrough does not provide internal general ledgers, tax preparation, or accounting services, it is strictly an onboarding tool that exports clean data to a third party fund accountant or administrator.
What Is Carta?
Carta is a software platform best known for equity management and capitalization table administration. Over time, it expanded into private fund administration, investor management, and venture capital operations. Its broader ecosystem includes equity management, cap table administration, employee equity management, venture fund administration, investor reporting, fund accounting support, and portfolio management. Carta is widely used throughout the venture capital and startup ecosystem, and because a majority of VC backed startups track their equity on Carta, a fund manager using Carta can see real time portfolio company valuations flow directly into their fund's financial books.
Feature Comparison: Passthrough vs Carta vs Avestor
| Feature | Passthrough | Carta | Avestor |
|---|---|---|---|
| Primary focus | Fast SPV and fund onboarding | Cap table and equity ecosystem | Bundled fund formation and admin |
| Internal fund accounting | No, exports to third party | Yes, integrated | Coordinated via tax partners |
| Onboarding speed | Fast, smart forms under 20 minutes | Standard digital signatures | Automated during setup |
| Custom legal language | Built to accommodate side letters | Works best with standard templates | Supported via partner attorneys |
| Open API for CRM integration | Yes, Salesforce, HubSpot, Altvia | Limited, integrated ecosystem preferred | Platform native, less external integration |
| Cap table management | Limited focus | Core capability | Not the primary focus |
| Fund formation bundled | No | No | Yes, via partner attorneys |
Passthrough wins on onboarding speed and integration flexibility for managers who already have an accounting relationship elsewhere. Carta wins for managers who need deep cap table management and want to tap into its venture capital network effect. Avestor comes out ahead for managers who want fund formation, onboarding, and administration bundled into one flat fee platform without needing Carta's broader equity management feature set.
Target Audience for Each Platform
Passthrough is often considered by emerging fund managers, syndicators, angel investors, SPV managers, small venture funds, and real estate sponsors, focused on simplifying fundraising and investor operations. Carta is commonly used by venture capital firms, startup founders, growth stage companies, private equity firms, institutional fund managers, and companies managing employee equity, extending beyond fund administration into equity ownership management.
Cap Table Management
One of the largest differences between Passthrough and Carta is cap table management. Carta has built its reputation around managing company ownership structures, supporting shareholder records, employee stock options, equity grants, valuations, and board approvals. Passthrough is not primarily positioned as a cap table management platform. Organizations requiring sophisticated equity administration often prioritize this capability during vendor evaluations.
Compliance, KYC, and Legal Flexibility
Passthrough automates KYC and AML instantly during the document signing process to eliminate investor delays, while Carta uses a mix of software gates and internal operational teams to review compliance flags during wider fund onboarding. On legal language flexibility, Carta works best with standardized templates and can experience friction when forced to adapt to highly unusual, complex legal structures or bespoke side letters, while Passthrough is specifically built to accommodate these more customized needs.
Related Onboarding and Fund Operations Tools
Managers researching this comparison often also look into adjacent categories, subscription document automation tools generally, LP investor portal software, frictionless investor identity verification services, event based fund accounting platforms for venture funds specifically, automated capital call tools, and year end Schedule K1 delivery systems. Each of these solves a narrower piece of the puzzle that a bundled platform like Avestor addresses as part of one integrated system.
Authoritative Resources
Related Avestor Resources
Frequently Asked Questions
Key Takeaways
- Passthrough and Carta approach fund operations from genuinely different angles, fast standalone onboarding versus a broad, integrated equity management ecosystem.
- Passthrough exports data to a third party accountant, while Carta bundles fund administration directly into its platform.
- Carta's strength lies in cap table depth and network effects from its dominant share of VC backed startup equity tracking.
- Passthrough's open API and custom legal language support suit managers who need flexibility outside a standardized template.
- Avestor's Customizable Fund bundles formation, onboarding, and administration for managers who need more than a point solution, per its About page.