Companies · Medical Devices

Zenflow, Inc.Winter 2015Active

SOUTH SAN FRANCISCO · CA, USA · Medical Devices · refined from filed group “Other Health Care · founded 2014 · http://zenflow.com

Diligence memoA one-page analyst read on Zenflow, Inc. — recommendation, valuation, rhythm, risks.
$75.3M
Total raised · real
3
Rounds
0.8×
Latest step-up
Top 5%
Sector rank · raised
Series B
Latest stage · inferred · Fri Nov 01 2024 00:00:00 GMT+0000 (Coordinated Universal Time)

Zenflow, Inc. looks fair against its niche peers and is active on financing cadence.

Synthesized from the figures below est. — every claim rests on a number shown on this page. Valuation uses the medical devices sector profile.

Analyst read est. — computed against this company's niche peers in the same era. Inputs shown; not a quoted figure.

Fair
  • Modeled value is 0.73× the median modeled value of Series B Medical Devices companies in 2022–2024 (5 peers) — value vs value, same stage and era.
  • Within the normal band (73% of peer median) for its niche.
Active
  • Last raise 20 mo ago; this sector typically re-raises about every 16 months.
  • Raising on or ahead of the sector's normal rhythm.
Leadership

No named principal in this company's public records yet — see all operators below.

Explore how these operators interlock with other companies in the operator network.

Where it sits in Medical Devices

Zenflow, Inc. is one of 233 Medical Devices companies tracked from SOUTH SAN FRANCISCO, CA, USA, on record since 2014. By capital raised it ranks among the largest (ahead of 96% of sector peers), and among the largest by modeled valuation est..

Ranking is computed against this company's own sector cohort — reported capital is fact; valuation tiers are modeled.

AI analyst read est. — model-extracted from this company's public description, not a verified fact. 30%

operates a technology-led product inferred from public copy

Grounded in: “You are a venture analyst

Medical device that provides a more effective, less invasive…

Forty million men in the US and over 500 million worldwide suffer from urinary obstruction related to benign prostatic hyperplasia (BPH). The majority of men will experience symptoms of this disease at some point in life. BPH, also known as prostate enlargement, leads to urinary straining, frequency, urgency, and sleep disruption. Despite the high prevalence and significant quality of life burden of BPH, established treatments are limited to drugs, which have limited effectiveness, and surgery, which carries a high risk of sexual side effects. The Zenflow Spring is a small implant delivered in the urologist's office in a simple procedure that provides quick and long-lasting symptom relief.

Medical Devicesmedical-devices
Find Zenflow, Inc. online

As reported in public records reported — not modeled.

US
Jurisdiction
Rule 506(b)
Reg D exemption
36
Investors (latest)
2024-11-01
First sale
Amount raised vs valuation, by round

Solid bars are reported offering amounts reported; hatched bars are the modeled post-money valuation est. — both on one shared scale so you can read raise-vs-worth at each round directly. Use the toggles to overlay data labels and the niche-peer / market average value lines.

Amount raised · realModeled valuation · estCumulative funded · real
$0$250M$500M$750M$1.0BSeries A · 2017-09-12 Raised $11M (real) Modeled valuation $266M (est)$11M$266MSeries A2017Series B · 2017-09-12 Raised $31M (real) Modeled valuation $834M (est)$31M$834MSeries B2017Series B · 2021-04-09 Raised $24M (real) Modeled valuation $495M (est)$24M$495MSeries B2021Series B · 2021-04-09 Raised $24M (real) Modeled valuation $482M (est)$24M$482MSeries B2021Series B · 2024-11-01 Raised $19M (real) Modeled valuation $117M (est)$19M$117MSeries B2024+$31M+$24M+$24M+$19MCumulative $110M

The line shows cumulative reported funding over the period; + labels show new capital added between points when there is room. Toggle on-bar figures, plus the niche-peer and market averages, to read this company against its cohort. Benchmarks are modeled medians.

Financing ladder & sequence gaps
Series A$11.0M · 2017
Series B$31.5M · 2017
Series B extension$24.4M · 2021
Series B extension$23.7M · 2021
Series B extension$19.4M · 2024

Stages are modeled from round size (public records carry no series label). No record for: Pre-Seed, Seed — the company may have raised it under a different exemption, merged it into an adjacent record, or skipped it. Sequence completeness: 50%.

Modeled valuation trajectory
$116.6M
Base estimate est.
$43.7M
Conservative case
$195.6M
Upside case
$107.9M
Modeled post-money

Round size and date are reported; the stage label is inferred from round size (latest is Series Ba $15M–$40M round). Valuation is modeled from stage benchmarks scaled by the medical devices sector profile. Directional, not a quoted figure.

Series A · modeled $265.9M · 2017-09-122017Series B · modeled $834.3M · 2017-09-12Series B · modeled $495.4M · 2021-04-09Series B · modeled $481.8M · 2021-04-09Series B · modeled $116.6M · 2024-11-012024
Model inputs · modeled:benchmark-stage-stepup-v1
18%
Dilution assumption
Implied ownership sold in the financing.
61%
Survival probability
41% low · 75% high
1.41×/yr
Annual markup
1.71×/yr upside case
1.7 yr
Elapsed time used
1.7 yr actual, capped for stale marks
medical devices
Sector profile
Adjusts growth and survival by industry.
Financing rhythm
21 mo
Avg between rounds
$10.5M/yr
Capital velocity
8.8 yr
On record since
2017
First round
5
Rounds on file
How it compares to the market

Benchmarked against 233 companies in Medical Devices. Each bar is a median (the middle company, not an average — outliers don't skew it). Two yardsticks: real money raised (reported on Form D) and modeled value (our estimate est.). These are whole-sector medians across all stages, except the per-stage row.

Total raised — vs sector median (real $, all stages) 29× above median
This company$75.3M
Sector median$2.6M
Latest round — vs other Series B rounds in sector (real $, this stage) 1.2× above median
This company$19.4M
Sector median$16.7M
Modeled value — vs sector median (estimate, all stages) 7.6× above median
This company$116.6M
Sector median$15.4M

Raised more than 96% of sector peers (real $). Modeled value above 90% of peers (estimate).

Niche peers — same stage & era

A tighter cohort than the sector chart above — only companies at the same stage (Series B) that last raised in the same ~3-year era, ranked by modeled value est. (not money raised). This is the exact set the analyst read compares against, so a like-for-like cohort is what makes "over/under-valued" meaningful. This company ranks #4 of 5.

This companyCohort peer
$100.0M$1.0B$10.0M$100.0MCapital raised (log)Proxim Diagnostics Corp · Series B Raised $22.9M · modeled $210.2M (est)Eximis Surgical Inc. · Series B Raised $40.6M · modeled $160.3M (est)EarliTec Diagnostics, Inc. · Series B Raised $27.0M · modeled $159.7M (est)Htg Molecular Diagnostics, Inc · Series B Raised $65.3M · modeled $110.3M (est)Zenflow, Inc. (this company) Raised $75.3M · modeled $116.6M (est)Zenflow, Inc.
CompanyStageRaised · realValue · estvs peer med.
Proxim Diagnostics CorpSeries B$22.9M$210.2M1.32×
Eximis Surgical Inc.Series B$40.6M$160.3M1.00×
EarliTec Diagnostics, Inc.Series B$27.0M$159.7M1.00×
Zenflow, Inc. this companySeries B$75.3M$116.6M0.73×
Htg Molecular Diagnostics, IncSeries B$65.3M$110.3M0.69×
Full financing history

Stage is inferred from round size est., not reported on the filing — a round's dollar size maps to a bucket: Pre-Seed <$1.0M · Seed $1.0M–$4.0M · Series A $4.0M–$15M · Series B $15M–$40M · Series C $40M–$100M · Series D+ $100M–$400M · Growth/Late >$400M.

StageAmount · realAnnouncedPost-money · estValue · estConf.
Series A$11.0M2017-09-12$50.1M$265.9M90%
Series B$31.5M2017-09-12$175.0M$834.3M90%
Series B$24.4M2021-04-09$135.4M$495.4M90%
Series B$23.7M2021-04-09$131.7M$481.8M90%
Series B$19.4M2024-11-01$107.9M$116.6M90%
What happened at each round

Step-up, pace versus the sector's normal cadence, and revenue/exemption moves — read straight from the reported round facts reported.

  1. Series A$11.0M2017-09-12
    • First recorded raise — entered as Series A.
    • 71 investors on this round.
  2. Series B$31.5M2017-09-12
    • Filed alongside the prior round (same month) — likely a tranche or amendment.
    • Round 2.9× larger than the prior — scaling up.
    • 86 investors on this round.
  3. Series B$24.4M2021-04-09
    • Raised again after 43 mo — slower than the ~16 mo sector norm.
    • Round roughly the size of the prior one.
    • 43 investors on this round.
  4. Series B$23.7M2021-04-09
    • Filed alongside the prior round (same month) — likely a tranche or amendment.
    • Round roughly the size of the prior one.
    • 40 investors on this round.
  5. Series B$19.4M2024-11-01
    • Raised again after 43 mo — slower than the ~16 mo sector norm.
    • Round roughly the size of the prior one.
    • 36 investors on this round.
Intelligence
2026 ~Q3
Modeled next raise · ~21mo cadence
$19.4M
Modeled next size est.range $19.4M$31.1M
0.8×
Last step-up
$10.5M/yr
Capital velocity

Predictive signals are modeled est. from this company's own cadence and step-up, plus sector benchmarks — directional, not advice. Peer set and a CSV export live in your analyst workspace.

Key people & operators

Officers, directors and promoters named in this company's public recordsreported — the people who run it (not its investors). "Also runs" counts come from name-matching across all records, so verify before acting.

PersonRoleAlso runsTied since
Robert Weisskoff11 other2017-09
Andrew Cleeland4 other2021-04
Bryan Kim3 other2017-09
John Beck2 other2024-11
Radu Cautis1 other2017-09
Susan Stimson1 other2024-11
Blayne Roeder2024-11
Nicholas Damiano2017-09
Nick Damiano2021-04
Shreya Mehta2017-09
Registry & provenance

Zenflow, Inc. is an official record sourced from the U.S. Securities and Exchange Commission (SEC). U.S. data is aggregated from SEC Form D filings.

United States
Country of record
US
Jurisdiction
1718715
SEC CIK
Similar companies

Nearest neighbours across the whole database — matched on sector, stage and capital scale, and on shared operators (officers or directors named at both companies in public filings). A discovery shortlist, not a valuation cohort — verify before acting, the same way modeled figures are directional.

CompanySectorStageRaised · realValue · estWhy similar
Onkos Surgical, Inc.Medical DevicesSeries B$72.3M$595.1Msame sector · same stage
Htg Molecular Diagnostics, IncMedical DevicesSeries B$65.3M$110.3Msame sector · same stage
Bardy Diagnostics, Inc.Medical DevicesSeries B$89.8M$11.9Msame sector · same stage
Vicarious Surgical Inc.Medical DevicesSeries B$55.9M$51.1Msame sector · same stage
Francis Medical, Inc.HealthtechSeries B$70.1M$233.8Mnetwork1 shared operator · same stage
Eximis Surgical Inc.Medical DevicesSeries B$40.6M$160.3Msame sector · same stage
Celsee Diagnostics, Inc.Medical DevicesSeries B$40.5M$135.3Msame sector · same stage
MedCrypt Inc.Medical DevicesSeries B$39.7M$45.6Msame sector · same stage
Semantically similar

Matched by meaning, not labels — a local language model reads each company's name, sector and description and ranks the closest in that learned space. This catches look-alikes that cross sector boundaries; the structured list above explains its matches, this one trusts the text. Directional, like every modeled signal here.

CompanySectorStageValue · estMatch
Selera Medical
One-time, device-based treatment for heart failure
Healthtech76%
Allotrope Medical Inc.
Advancing surgical precision through safe electrical stimulation.
Medical DevicesSeries A$93.5M75%
V-Flow Medical
Transforming the lives of millions of women suffering from chronic…
Medical Devices73%
Volt Health
Volt Health is developing medical devices that deliver electrical…
Healthtech73%
Wilson Creek Surgical Center, LLCMedical DevicesPre-Seed$3.2M73%
PureFlowCath, LLCOther Health CareSeed$94.6M72%
Quail Surgical & Pain Management Center LlcHospitals and PhysiciansPre-Seed$5.3M71%
Augustine Surgical, Inc.Medical DevicesPre-Seed$36.9M71%
Frequently asked
How much funding has Zenflow, Inc. raised?
Zenflow, Inc. has raised approximately $75.3M in disclosed capital across 3 recorded financing rounds, aggregated from public filings.
What is Zenflow, Inc.'s estimated valuation?
Provath's modeled valuation for Zenflow, Inc. is approximately $116.6M (modeled range $43.7M–$195.6M). This is an algorithmic estimate derived from round sizes and same-niche peers — not a quoted or reported figure.
What funding stage is Zenflow, Inc. at?
Zenflow, Inc.'s latest modeled financing stage is Series B. Its most recent recorded round closed around Fri Nov 01.
What does Zenflow, Inc. do and where is it based?
Zenflow, Inc. operates in the Medical Devices sector, based in SOUTH SAN FRANCISCO, CA, USA. Medical device that provides a more effective, less invasive…
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