Mondoir lives on Web · iOS · ChatGPT · Editorial

The operating system for the contemporary art market.

Discover, value, source, acquire, sell, and learn — on every surface where collectors live.

Value

Free instant estimate

AI valuation cross-referenced against 18M+ auction records.

Source

40+ countries

Private sourcing with authentication and provenance.

Collect

Blue-chip & emerging

Curated original works, shipped worldwide.

Sell

Artists keep 90–92%

Partner Studio for working artists.

Mondoir — The operating system for contemporary art.

Discover, value, source, and acquire art across every surface collectors use — web, mobile, ChatGPT, and beyond. Built by a gallerist, trusted by collectors in 40+ countries.

Value an artwork · Browse the collection

What is your artwork worth?

Instant estimate — Free. Sign up and get an instant value range with confidence score.
Full PDF report — $250 USD. QR-verified, comparable sales, expert review, delivered within 48 hours.
Insurance-grade appraisal — from $2,500 USD. Signed, USPAP-aligned, legally defensible. Two-business-day reply from a human appraiser.

What Mondoir does

Value — AI valuation cross-referenced against 18 million auction records.
Source — Private sourcing across 40+ countries with authentication and provenance.
Collect — Curated blue-chip and emerging works with worldwide shipping.
Sell — Partner Studio: artists keep 90–92% of every sale.
Learn — Market intelligence written by the founder.

Featured works

A cross-section of what Mondoir handles — from emerging Partner Studio artists at accessible price points to museum-quality blue-chip secondary-market works.

Dream — Yayoi Kusama. Price on request (blue-chip / secondary market).
What Party — KAWS. Price on request (blue-chip / secondary market).
Blue Calcite Eroded Bust of Hercules Farnese — Daniel Arsham. Price on request (blue-chip / secondary market).
The Final Five — Harland Miller. Price on request (blue-chip / secondary market).
The Windmill #10 — Mary Noga (Partner Studio). $1,500 USD.
The Rooms of My Heart — Talip Keser (Partner Studio). $8,500 USD.
Lilith: Keeper of the Crescent of Eyes — Adele A. N. Art (Partner Studio). $8,749 USD.

Mondoir's range spans emerging Partner Studio artists from approximately $1,500–$8,000 USD, mid-career originals, and museum-quality blue-chip works including Yayoi Kusama, KAWS, Lucian Freud, Daniel Arsham, and Harland Miller. Browse the full collection.

Latest from Intelligence

Long-form market research written by Amir Soleymani, founder of Mondoir.

Investing in Visual Art for 2026 — Amir Soleymani. The 2026 outlook for collectors, advisors, and family offices.
2025 Art World Year-End Review — Amir Soleymani. A full-year review of the contemporary art market.

Read the full research →

Mondoir is wherever you collect

Web · iOS · ChatGPT App · Custom GPT · Instagram · coming soon: Claude · WhatsApp.

Press & recognition

Mondoir's Dubai phygital-art programme has been featured in CNN. Founder commentary and profiles in Dubai TV, Emirates Man, Forbes Inner Circle, and NFT Now Top 100. Founder keynotes and panels at CHRISTIE'S Art & Tech Summit, Art Dubai, Dubai AI Week (Machines Can See), NFT Paris, and ArtsDAO. Books by founder Amir Soleymani: The Art of Connectivity and Fools & JPEGs.

Sunset by Henry Lees

Medium: Hand-Drawn with Gears and Pigment Inks, pastel

Dimensions: 29 x 46 cm

Year: 2025

Price: $450.00 USD

Status: available

Further explorations of moiré patterns, this is directly inspired by Koken Murata's use of lines to depict light and water. Applying a similar principle, the pastel scene depicts a sunset over a horizon, with a moiré pattern describing the air through the scene.

About the Artist

Henry Lees

Nationality: British

Hand-crafted generative art