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How to Pitch Spark Capital

How Spark's early and growth teams split the work, what its 2026 funds look like, and how to find the right partner.

Spark Capital at a glance

Checked against Spark Capital's own pages and filings, October 2026

Firm
Spark Capital, founded in 2005 by Santo Politi, Todd Dagres and Bijan Sabet.1,2 Principal office in Boston, with offices in New York and San Francisco.3
Assets
$8.7B in committed capital at year-end 2025, per Spark's February 2026 investor overview (preliminary).4
Funds
Spark Capital IX, the early-stage fund, sold $1.0B and Growth Fund VI sold $2.33B in 2026.5,6
Stages
Seed through Series C. The early team makes about 15-20 seed and 20-25 Series A investments per fund, targets 15-20% ownership and almost always takes a board seat; the growth team does Series B and C.4
Check size
Early stage: not published (the target is 15-20% ownership). Growth fund: $25M to $100M per investment.4
Early team
Fraser Kelton (technical founders; former head of product at OpenAI), Natalie Vais (tools, platforms, infrastructure), Mikowai Ashwill, Alex Finkelstein (product-focused founders, often outside Silicon Valley), Santo Politi and Theo Bleier (systems-heavy founders).7
Recent leads
  • Latent, $80M Series A, co-led, April 20268
  • RadixArk, $100M seed, co-led, May 20269
  • Oratomic, $300M Series A, co-led, July 202610
  • CivilGrid, $26M Series A, August 202611
  • HiringCafe, $6.8M pre-seed, September 202612
  • TAR, $120M Series A, September 202613
Amounts are whole rounds, not Spark's share.
How to reach
No pitch form and no published email; the only contact Spark gives is its Boston postal address.14 Partner profiles link their X and LinkedIn.7 Its homepage says pitch decks aren't everything and there is no single right way to approach the firm.15
  1. Spark Capital: Santo Politi
  2. Spark Capital: Bijan Sabet
  3. Spark Capital Form ADV (March 2026)
  4. Spark Capital overview (February 2026), published by the Nebraska Investment Council
  5. SEC Form D/A: Spark Capital IX (June 2026)
  6. SEC Form D/A: Spark Capital Growth Fund VI (June 2026)
  7. Spark Capital: Team
  8. The SaaS News: Latent raises $80M Series A (April 2026)
  9. The SaaS News: RadixArk launches with $100M seed (May 2026)
  10. TechCrunch: Oratomic raises $300M (July 2026)
  11. TechCrunch: CivilGrid raises $26M (August 2026)
  12. Pulse 2.0: HiringCafe raises $6.8M pre-seed (September 2026)
  13. The Next Web: TAR raises $120M Series A (September 2026)
  14. Spark Capital: Terms and policies
  15. Spark Capital

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The Short Version

Spark Capital is a Boston firm, with offices in New York and San Francisco, whose portfolio reads like a list of defining consumer and enterprise companies: Twitter, Slack, Postmates, Wayfair, Discord, Cruise and Plaid. It invests from seed through Series C, and its 2025 and 2026 investments lean heavily into AI (models, chips and infrastructure), energy, space and quantum.

What Spark Capital Actually Looks For

Founded: 2005

Assets: $8.7 billion committed at year-end 2025, before a $1.0 billion early fund and a $2.33 billion growth fund in 2026

Stage: Seed through Series C

Check sizes: Early stage not published (Spark targets 15-20% ownership); growth fund $25M to $100M

Sectors: No published list; recent investments lean into AI, energy, space and quantum

Find the Right Partner on the Early Team

Spark describes itself as a collaborative team of 14 investors, split into an early team (seed and Series A) and a growth team (Series B and C). For a first round, the early team is who you want: each partner's profile links their X and LinkedIn, and their portfolios differ enough that matching your company to one partner beats a generic note to the firm.

Founder Conviction Over Traction

Spark leads rounds before meaningful traction exists: in September 2026 it led HiringCafe's $6.8 million pre-seed. Its record is not all early, though: it led Twitter's Series B in 2008 and Discord's Series C in 2016. Partner Alex Finkelstein puts its taste plainly: "I love the scrappy, underdog founders, who've often never done it before."

Consumer Roots

Spark's history is consumer (Twitter, Wayfair, Discord), and its best-known enterprise bets (Slack, Plaid) are products end users chose. That is a reading of the portfolio, not a published criterion: Spark publishes no sector list.

What Spark Has Been Backing

Recent leads, 2026:

  • AI infrastructure: RadixArk ($100 million seed, co-led, May 2026)
  • Power for AI data centers: TAR ($120 million Series A, September 2026)
  • Infrastructure and quantum: CivilGrid ($26 million Series A) and Oratomic ($300 million Series A, co-led)
  • Consumer AI at the earliest stage: HiringCafe ($6.8 million pre-seed)

What Spark passes on: it publishes no exclusion list. Its homepage says pitch decks aren't everything and there is no single right way to approach the firm.

What to Show by Stage

Seed: Spark publishes no seed criteria. It leads rounds as early as pre-seed, so the team and the insight are the pitch.

Series A: Spark publishes no metric thresholds. The early team targets 15-20% ownership and almost always takes a board seat.

Series B and C: handled by the growth team, which writes $25 million to $100 million per investment.

How to Structure Your Application

Identify the right partner first. Read Spark's portfolio and the early team's profiles and X feeds, and find the partner whose investments most closely resemble yours. A note to the right partner beats a generic note to the firm.

Lead with your connection to the problem. Why you, and why now. If you have a lived-experience story, lead with it.

Show the shift. Spark's best-known investments rode a change in behavior or technology: mobile communication (Twitter), consumer-grade work software (Slack), chat for friends and communities (Discord). What shift does your company ride?

Bring the product. Spark's homepage says pitch decks aren't everything. Show what you have built, not just the deck.

A second track: Pitch Protocol

Warm paths into a fund like Spark Capital take time. Pitch Protocol is not a route into Spark Capital; it is a second track you can run alongside your outreach. Applying is free, your own AI agent submits one application in about ten minutes with no web form, and the funds in our network whose thesis matches reach out to you directly. Apply to the First 100 Founders Cohort →

Frequently Asked Questions

Does Spark invest outside New York and Boston?

Yes. Spark has a San Francisco office, where much of its investing team sits, and partner Alex Finkelstein has backed founders in Germany and Spain.

How important is the warm intro to Spark?

Spark states no intake policy and publishes no pitch form or email. The practical routes are a partner's own X or LinkedIn and an introduction through someone Spark knows.

Does Spark lead rounds?

Yes, from pre-seed to Series C. In 2026 it led HiringCafe's pre-seed, co-led RadixArk's $100 million seed, and led Series A rounds for CivilGrid and TAR. Its early team almost always takes a board seat.

How big is Spark Capital's latest fund?

Spark Capital IX, its early-stage fund, sold $1.0 billion in 2026, and Growth Fund VI sold $2.33 billion, per SEC filings.

What check size does Spark write?

Spark publishes no early-stage range; it targets 15 to 20 percent ownership in seed and Series A deals. Its growth fund writes $25 million to $100 million per investment.

Can I apply through Pitch Protocol instead of waiting for a warm intro?

Pitch Protocol is not a back door into Spark Capital, and we do not share which funds review an application before it is in. What it does: applying is free, your own AI agent (Claude, ChatGPT, Cursor or any agent that can read a URL) submits one application in about ten minutes with no web form, and the funds in our network whose thesis matches reach out to you directly. Founders anywhere can apply. Keep working your warm path to Spark Capital in parallel. Apply to the First 100 Founders Cohort →