Overview
Castia began in 2021 as Acasa, a Colombian "buy before you sell" proptech. It financed a new-home down payment against equity in an owner's current property, then managed the sale. After raising $4.7 million in equity and $33 million in debt, the company expanded into Mexico and rebranded. By 2023, Castia had switched to a rent-payment app that offered loyalty points, credit reporting, and rent loans.
The two products shared a housing thesis but not an operating model. One required property underwriting and warehouse capital; the other needed payment volume, cheap rewards, landlord acceptance, and credit economics. Castia processed more than COP 4 billion in rent during 2023, then entered liquidation in November 2024.[1][2] No founder has published a post-mortem, so the precise trigger remains undisclosed.
Founding Story
Brothers Mauricio and Nicolas Peñaranda grew up in Bogotá, where slow property sales and high mortgage down payments made moving unusually hard. They founded Acasa with Eduardo Restrepo in 2021. Mauricio brought consulting, an MBA from Columbia Business School, and operating experience at Clever Leaves. Nicolas had worked in banking and insurance consulting, run an agricultural startup, and helped build a consumer-snack company. Restrepo had more than a decade in corporate finance.[3]
The founders targeted homeowners whose wealth was trapped in the home they occupied. Mauricio told La República that selling a house in Latin America could take "between one year and a year and a half."[4] Acasa financed the down payment on the next property, helped originate the mortgage, and took responsibility for selling the old home. If it did not sell within six months, Acasa guaranteed a purchase under its stated model.[2]
The company entered Y Combinator's Winter 2022 batch. At Demo Day, Mauricio wrote that Acasa had grown fivefold since December.[5] The momentum helped the team close $4.7 million in seed equity and a $33 million debt facility. Quona Capital led the equity round; Architect Capital supplied the debt; MetaProp, Wollef, YC, and other investors participated.[6]
In June 2022, Acasa became Castia. Eduardo Restrepo said the new identity would support expansion and position the company as a partner through the home-buying and selling process.[7] Within a year, the product had changed much more than the name.
Timeline
- 2021: Mauricio Peñaranda, Nicolas Peñaranda, and Eduardo Restrepo founded Acasa in Bogotá.[3]
- March 2022: Acasa completed YC W22 and announced $4.7 million of equity plus $33 million of debt.[6]
- June 2022: The company rebranded to Castia and pursued Mexico alongside Colombia.[7]
- 2023: Castia launched rent payments, rewards, credit-building, and rent loans in Colombia.[8]
- 2023: The company reported processing more than COP 4 billion in rent payments.[1]
- November 2024: Castia entered liquidation, according to Dealroom; Quona excluded it from active portfolio companies at year-end.[2][9]
What They Built
Acasa's first product compressed a chained housing transaction. A homeowner selected a new property before selling the old one. Acasa assessed the existing home's equity, financed the new down payment, helped arrange a mortgage, and marketed the former home. The promise addressed a genuine sequencing problem: owners could not fund the next purchase until the first sale closed, yet waiting for a sale made it difficult to secure the desired property.
That product carried real-estate and credit exposure. Its $33 million debt facility was not ordinary startup runway; it funded transactions. The service expanded from Colombia to Mexico in early 2022, and Castia reported sevenfold monthly transaction growth during its first six months in Mexico.[7]
The later Castia app addressed renters instead. Users routed monthly rent through Castia using different payment methods. They could earn Puntos Colombia, accumulate 1% of rent in an internal currency called Bricks, build a payment record, and redeem value with partners or toward a future down payment. The app also offered rent-specific credit.[1]
Mauricio described the new position in a 2023 radio interview: "We are the only company doing this, not only in Colombia, but in Latin America; we are designed so tenants can earn benefits for paying rent."[8] Puntos Colombia supplied a recognizable loyalty network, and Castia turned the region's largest recurring household payment into the engagement event.
The product evolution was a change in customer, capital, distribution, and risk. Homeowners moving between properties became tenants paying monthly. Asset-backed bridge finance became payments, rewards, and short-term credit. Public material does not explain whether the first model was wound down, sold off, or simply replaced.
Market Position
Target Customers
Acasa served existing homeowners with enough equity to support a new purchase but insufficient liquid cash for the next down payment. Castia later served Colombian renters who wanted rewards, a credit record, or help bridging rent. Landlords and property managers were necessary participants even when the tenant was the marketed user.
Market Size
Universidad de los Andes cited more than six million renting households in Colombia in 2023.[10] That count made rent an attractive payment rail, but payment volume is not revenue. A viable service needed income from processing, credit, landlord software, merchant-funded rewards, or cross-sold housing products.
The US provided proof that rent rewards could reach scale. Bilt said it processed more than $36 billion in annual rent and HOA payments by the end of 2024, up from $11 billion the year before.[11] Its scale also shows the ingredients Castia lacked publicly: major property-manager distribution, financial-product economics, and a broad redemption network.
Competition
The original model competed with banks, mortgage brokers, iBuyers, and traditional agents. Its advantage was speed and coordination. Its disadvantage was capital intensity and property risk. Regional proptechs such as Habi and La Haus already competed for transaction flow, data, and consumer trust.
The rent app faced banks, card rewards, Puntos Colombia's direct partners, rent-collection software, and informal bank transfers. Castia's partnership with Puntos Colombia strengthened redemption and exposed the app's replaceability. The loyalty network or a bank could reward rent without giving Castia a durable relationship. Credit reporting and rent loans differentiated the product, but they introduced compliance, underwriting, and collections costs.
Castia crossed markets rather than owning one. It knew housing transactions and financing, then tried to build payment frequency with renters. The pivot gained a larger audience but discarded much of the first model's transaction-specific advantage.
Business Model
Public sources do not disclose Castia's revenue. The buy-before-you-sell business could earn transaction fees, financing spread, or property-sale economics, but the company never published a breakdown. The $33 million Architect Capital facility funded lending or home transactions and should not be confused with $33 million of equity.[6]
The rent product paid users 1% in Bricks and awarded external loyalty points. To cover those costs, Castia needed payment fees, partner subsidies, lending income, or valuable downstream conversion into mortgages and property purchases. None was publicly quantified. Credit for rent could generate interest income, but it also concentrated exposure in households already short on liquidity.
Castia reported COP 4 billion of 2023 payment volume, roughly $1 million at contemporary exchange rates, but that is an inference and not revenue.[1] At a hypothetical 1% gross take rate, that volume would produce only COP 40 million before rewards and operations. The exercise illustrates the scale problem; it does not establish Castia's actual pricing.
Traction
Acasa said it ended 2021 at 2.5 times its original transaction goal and grew fivefold between December and YC Demo Day.[6][5] After entering Mexico, it reported a sevenfold increase in monthly transactions over six months.[7]
The rent product processed more than COP 4 billion in 2023. No source gives active users, transaction count, repeat rate, loan performance, or gross margin. Castia's LinkedIn page attracted roughly 4,100 followers, but social reach is not product traction. The limited evidence supports early use, not self-sustaining scale.
Post-Mortem
A capital product became a rewards product
Castia's central structural problem was not merely a weak housing market. The company changed the unit it had to make profitable. Acasa earned value from a high-ticket move and used warehouse debt to bridge a property sale. The later app processed a recurring payment and returned 1% of that payment to the user.
The team had tried to scale the first model with geographic expansion and $33 million of debt. By mid-2022 it expected Mexico to become half of the business.[7] By 2023, public messaging centered on renters, points, and small rent loans. That pivot reduced direct property exposure but created a volume business with reward costs.
The non-obvious mechanism is capital-model discontinuity. Debt sized for property transactions does not become an advantage in a low-margin loyalty app. The underwriting data, operational teams, and distribution relationships needed for homeowner bridge finance are different from those needed for rent acceptance and merchant-funded rewards. A pivot can conserve a brand and team while abandoning the assets investors originally financed.
Payment volume did not prove reward economics
COP 4 billion processed in 2023 sounds substantial, but rewards were based on the same volume. Castia promised 1% in Bricks before accounting for Puntos Colombia, card processing, fraud, support, and credit losses.[1] The company tried to add value through credit history, loyalty redemption, and rent loans. It did not disclose how those layers paid back acquisition and reward costs.
Bilt's later scale in the US is a useful counterargument. Rent rewards were not inherently flawed. Bilt built distribution through property managers and financial partners, then expanded across housing and neighborhood commerce. Castia's public record shows a loyalty partnership but no comparable landlord network or card economics. A valid concept can still fail when its subsidy engine arrives before its distribution engine.
The exact shutdown cause remains private
Dealroom records liquidation in November 2024, and Quona's 2024 impact report excludes Castia from active portfolio companies.[2][9] The website no longer completes a normal TLS connection. The founders have moved to Eterna Capital, Muebles Jamar, and a stealth startup. These facts establish termination, not motive.
No founder described whether rising rates, credit losses, debt covenants, slow landlord adoption, reward cost, fundraising conditions, or another event forced the liquidation. It would be false precision to pick one. The observable record supports a narrower judgment: Castia changed from a financed housing transaction product to a subsidized rent-payment product, reported modest payment volume, and shut down before proving the new model's economics.
Key Lessons
- Debt follows a specific machine. Castia's $33 million facility supported home transactions. Once the company moved to rent rewards, that capital structure no longer matched the operating model.
- A pivot can discard accumulated advantage. The rent app kept the housing mission but changed customer, distribution, risk, and revenue. Shared subject matter did not make the businesses adjacent in practice.
- Payment volume needs a take-rate story. Castia moved COP 4 billion while promising 1% back, yet published no revenue or margin. Gross payment value hid the harder question of who funded each reward.
- Partnerships are not distribution ownership. Puntos Colombia made rewards useful. It did not by itself create landlord acceptance, repeat payment behavior, or a defensible source of income.
Sources
- Colombia Fintech: Castia joins the association
- Dealroom: Castia company profile
- Y Combinator: Castia
- La República: Interview with Mauricio Peñaranda
- Mauricio Peñaranda on LinkedIn
- Descubre.vc: Acasa raises equity and debt
- El Economista: Acasa becomes Castia
- Blu Radio: Castia rent rewards interview
- Quona Capital: 2024 Impact Report
- Universidad de los Andes: Castia and rent
- Bilt: 2024 member letter