TSSI vs ERII

For growth investors, TSS, Inc.

(TSSI) is the stronger pick with 65. 9% revenue growth year-over-year, versus -7. 1% for Energy Recovery, Inc. (ERII). Energy Recovery, Inc. (ERII) offers the better valuation at 27. 6x trailing P/E (28. 2x forward), making it the more compelling value choice. Analysts rate Energy Recovery, Inc. (ERII) a "Buy" — based on 16 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Energy Recovery, Inc.

(ERII) is the cheapest at 27. 6x versus TSS, Inc. at 28. 0x. On forward P/E, Energy Recovery, Inc. is actually cheaper at 28. 2x.

Over the past 5 years, TSS, Inc.

(TSSI) delivered a total return of +29. 2%, compared to -43. 0% for Energy Recovery, Inc. (ERII). Over 10 years, the gap is even starker: TSSI returned +116. 5% versus ERII's +2. 7%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Energy Recovery, Inc.

(ERII) is the lower-risk stock at 1. 53β versus TSS, Inc. 's 3. 50β — meaning TSSI is approximately 129% more volatile than ERII relative to the S&P 500. On balance sheet safety, Energy Recovery, Inc. (ERII) carries a lower debt/equity ratio of 5% versus 54% for TSS, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), TSS, Inc.

(TSSI) is pulling ahead at 65. 9% versus -7. 1% for Energy Recovery, Inc. (ERII). On earnings-per-share growth, the picture is similar: TSS, Inc. grew EPS 154. 2% year-over-year, compared to 5. 0% for Energy Recovery, Inc.. Over a 3-year CAGR, TSSI leads at 100. 2% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Energy Recovery, Inc.

(ERII) is the more profitable company, earning 17. 0% net margin versus 6. 2% for TSS, Inc. — meaning it keeps 17. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ERII leads at 18. 2% versus 4. 3% for TSSI. At the gross margin level — before operating expenses — ERII leads at 65. 2%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

On forward earnings alone, Energy Recovery, Inc.

(ERII) trades at 28. 2x forward P/E versus 51. 0x for TSS, Inc. — 22. 8x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ERII: 12. 0% to $13. 00.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Energy Recovery, Inc.

(ERII) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding. TSS, Inc. (TSSI) carries a higher beta of 3. 50 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ERII: +2. 7%, TSSI: +116. 5%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (TSSI (Technology) and ERII (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: TSSI is a small-cap high-growth stock; ERII is a small-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.